Words That Start With O

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300 Words

1 of Used to show that something belongs to, or is a part of, something else.
2 on Positioned at, upon, or touching the surface of something.
3 or Used to link two or more alternatives, showing that any one of them could be true or chosen.
4 one The number 1; the first positive whole number.
5 out Away from the inside, a home, or a central point.
6 other Different from the one(s) already mentioned; additional or remaining.
7 only Being the single one of its kind; sole.
8 our Belonging to or associated with the speaker and at least one other person.
9 over Finished; ended.
10 off Away from a place, position, or reference point.
11 old Having existed for a long time; not new or young.
12 own Belonging to a particular person; used to stress possession.
13 once On one occasion only; a single time.
14 order The arrangement of things in a particular sequence or pattern.
15 OH Used to express surprise, realization, understanding, or emotion.
16 open Not closed, blocked, or sealed — allowing entry, passage, or view.
17 often Frequently; many times.
18 others People other than oneself or the ones already named.
19 office A room or building where people do administrative or professional work.
20 outside The outer part or surface of something; the area beyond its boundary.
21 official Approved by, or coming from, a proper authority.
22 online Connected to the internet or another network, and actively available or in use.
23 original The first of its kind, existing before any copies.
24 OK All right; acceptable, permitted, or satisfactory.
25 October The tenth month of the year, between September and November, associated in the northern hemisphere with autumn...
26 oil A thick, greasy liquid, either from plants, animals, or petroleum, used for cooking, fuel, or lubrication.
27 ones A team's first-choice or senior squad, as opposed to reserves.
28 offer To present something for someone to accept or refuse.
29 officer Someone holding a position of authority, especially in the military, police, or government.
30 operation The way something works, or the act of making it work.
31 organization A group of people, or of legal entities, formed for a particular purpose and governed by set rules.
32 opening A gap or hole that allows passage or access.
33 opinion A belief or judgment that someone holds about a subject, not necessarily based on proven fact.
34 opportunity A favorable set of circumstances that makes it possible to do something.
35 older Comparative form of "old"; greater in age or having existed longer.
36 operations The practical, day-to-day activities involved in running a business or organization.
37 otherwise In a different way; differently.
38 overall Taking everything into account; general.
39 opened Already made open; having gone through the process of opening.
40 obviously Clearly; in a way that's easy to see or understand.
41 option One of the choices available to someone in a given situation.
42 Orders An English surname.
43 owner A person or group who legally possesses something.
44 onto Moving to a position on top of or upon something.
45 operating Currently running or functioning.
46 ordered Arranged neatly and systematically; not messy or chaotic.
47 originally At first, or in the beginning, before things changed.
48 owned Belonging to a specific person, group, or category of owner.
49 opposition Strong disagreement with, or resistance to, a plan, policy, or idea.
50 ocean One of the huge bodies of salt water that cover most of the Earth's surface.
51 Obama A Luo surname, notably borne by Barack Obama, 44th president of the United States, and also the name of a Japa...
52 origin The point where something begins or comes from.
53 obvious Easy to see or understand; not needing explanation.
54 ourselves Used to refer back to the speaker and others as the same people affected by the action, or to emphasize that g...
55 opposite Located directly across from something, or facing the other direction.
56 object A physical thing that can be seen or touched.
57 offering Something given, presented, or put up for consideration, especially as a gift, contribution, or for sale.
58 organized Arranged carefully and in good order; not chaotic.
59 occur To happen or take place.
60 orange A round citrus fruit with a sweet-tart taste and a thick, textured peel that turns yellow-orange when ripe; al...
61 opposed Disagreeing with or against something; in conflict with.
62 officially According to official rules, procedures, or authority.
63 observed Noticed or watched; seen and taken note of.
64 obtain To get or acquire something, often through effort or a formal process.
65 operate To work or run, especially a machine or system.
66 organisation The standard British and Australian spelling of "organization" — a group of people with a shared purpose, or t...
67 objective Based on facts rather than personal feelings or opinions.
68 occasion A particular time when something happens, especially something notable.
69 op Informal term meaning to promote someone to administrator or operator status in an online chat or game.
70 offensive Causing anger, disgust, or hurt feelings.
71 Olympic Relating to the Olympic Games, or of a scale and standard associated with them.
72 output The amount of something produced, especially over a given period.
73 outstanding Exceptionally good; far better than average.
74 ordinary Normal, usual, or unremarkable; not special or different from what is expected.
75 outcome The result or effect of an action, event, or process.
76 ownership The legal right of possessing something.
77 organic Relating to or coming from living things.
78 odd Strange, unusual, or not what you would expect.
79 occasionally Now and then; sometimes, but not often.
80 occupied Currently in use or taken, such as a seat, room, or toilet.
81 ongoing Currently happening or still in progress; not yet finished.
82 ought Used to express what is the right or sensible thing to do, or what is likely to be true.
83 operated Powered or controlled by a specified means.
84 operator A person who runs or controls a machine, vehicle, or system.
85 overcome To successfully deal with or defeat a difficulty or obstacle.
86 occupation A person's job or profession.
87 Olympics The Olympic Games, the major international multi-sport competition held every four years.
88 opera A theatrical work in which the story is told mainly through singing, with orchestral music.
89 oral Relating to the mouth.
90 oxygen A colourless, odourless gas that makes up about a fifth of the air and is essential for humans and animals to...
91 oldest The person or thing that has existed longest among a group, especially the eldest child in a family.
92 overseas Located in or coming from another country, typically across the sea.
93 operational Working and ready to be used.
94 opponent A person who competes against or opposes someone else, as in a game, contest, or argument.
95 outer Farther from the center; on the outside.
96 observation The act of watching something carefully.
97 odds The likelihood of something happening, especially as expressed in betting.
98 organ A part of the body, such as the heart or liver, that performs a specific function.
99 outdoor Existing, happening, or used in the open air rather than inside a building.
100 offense A wrongdoing, crime, or breach of a rule.
101 Oliver A given name, historically also used as a common English male first name and surname.
102 oriented Focused on or organized around a particular goal or principle.
103 Oscar The gold statuette awarded each year by the Academy of Motion Picture Arts and Sciences for achievement in fil...
104 ours The thing or things belonging to the speaker and others, used without a following noun.
105 os In anatomy, a bone, or an opening shaped like a mouth — most commonly the opening at either end of the cervix.
106 obligation A duty or requirement to do something, often because of a promise, law, or moral sense.
107 overview A short summary that covers the main points of something without going into detail.
108 observe To watch someone or something carefully.
109 owe To be required to pay money back to someone.
110 offence British spelling of "offense" — a crime or breach of the law, or a feeling of being hurt or insulted.
111 outfit A set of clothes worn together, often for a particular occasion.
112 occasional Happening from time to time, but not regularly or often.
113 olive A small oval fruit, usually eaten pickled or pressed for its oil, that grows on a Mediterranean tree.
114 Ottawa The capital city of Canada, located in Ontario, and by extension the country's federal government.
115 outta An informal spelling of "out of," used to reflect casual speech.
116 overnight Throughout the night, or during the course of one night.
117 openly In a direct, honest, and visible way, without hiding anything.
118 orbit The curved path an object follows as it travels around another body due to gravity, such as a planet around th...
119 Orleans A historic city in north-central France, the capital of the Loiret department, on the Loire river.
120 Oklahoma A state in the south-central United States; its capital is Oklahoma City.
121 opposing On the other or contrary side; in conflict with another.
122 outbreak A sudden start or spread of something unwelcome, such as a disease or violence.
123 oak A large deciduous tree with lobed leaves and acorns, valued for its strong wood.
124 OL Informal spelling of "old", used to imitate casual speech.
125 outlook A person's general attitude or view of life and the future.
126 oven An enclosed chamber used for baking, roasting, or heating food.
127 occurring Happening, especially in a specified way or place.
128 optical Relating to sight, vision, or the science of light.
129 ordering The act of arranging things into a sequence.
130 overwhelming So strong, large, or intense that it is hard to resist or cope with.
131 orchestra A large group of musicians who play together, typically combining strings, woodwind, brass, and percussion.
132 ore Rock or mineral from which metal or other valuable material can be extracted.
133 occurrence Something that happens; an event or instance.
134 organizational Relating to an organization or to the way something is organized.
135 organize To arrange something so it is in order or works efficiently.
136 Owen A masculine given name of Welsh origin, meaning "young warrior" or "well-born".
137 observer Someone who watches, notices, or pays close attention to something.
138 obsessed Completely preoccupied with one thing, to an unhealthy or extreme degree.
139 occupy To live in, use, or take up a space.
140 optional Not required; available to choose but not compulsory.
141 orthodox Following the traditional, widely accepted beliefs or practices of a religion or system of thought.
142 offshore Located in the sea some distance from the coast.
143 offset Something that balances out or compensates for something else.
144 oppose To disagree with or actively resist something.
145 organizing The process of arranging or coordinating something.
146 Oz Abbreviation for ounce, a small unit of weight.
147 outline The line or shape marking the edge of something.
148 optimal The best possible under the circumstances; most favorable given the constraints.
149 outlet A wall socket that supplies electric power to plugged-in devices.
150 Olds Informal, plural term for one's parents.
151 operative In effect, functioning, or currently applicable.
152 oath A solemn formal promise, often invoking something sacred, to tell the truth or keep a commitment.
153 outlined Having its edge or main points marked out.
154 obey To do what someone in authority tells you to do.
155 obliged Required to do something.
156 OMG An exclamation of surprise, shock, or excitement — short for "oh my God."
157 overhead Positioned above, especially above one's head.
158 Orlando A masculine given name and surname of Italian origin, and a major city in Florida named in the nineteenth cent...
159 overtime Extra time worked beyond someone's normal hours, or the higher pay for that work.
160 objection A statement of disagreement or opposition, often with a reason attached.
161 oversight A mistake made by failing to notice or consider something.
162 observatory A building equipped for watching the stars and other astronomical events, usually with a telescope.
163 ou A now probably extinct Hawaiian honeycreeper bird.
164 owed Due to be paid or given back.
165 oval A rounded, elongated shape like an egg or a flattened circle.
166 owing Still needing to be paid.
167 occupational Relating to a person's job or work.
168 optimistic Hopeful and expecting a good outcome.
169 obesity The condition of carrying an unhealthy amount of body fat.
170 obscure Not well known.
171 obsession A single idea, activity, or interest that dominates someone's thoughts far more than is normal or healthy.
172 ooh An exclamation expressing surprise, delight, or awe.
173 Onion An informal term for someone from Bermuda, referencing the island's once-famous onion crop.
174 opt To choose one option over another, often after weighing alternatives.
175 offspring A person's child, or an animal's or plant's young.
176 oppression The use of power in a cruel or unjust way to control or hold down a person or group.
177 overwhelmed Completely overcome by emotion, work, or difficulty, to the point of struggling to cope.
178 owl A mostly nocturnal bird of prey with large forward-facing eyes and a sharp, hooked beak.
179 Olivia A female given name, ultimately from Latin, and one of the most popular girls' names in English-speaking count...
180 ot The name of a letter (Ѿ / ѿ) that once appeared in the Cyrillic alphabet.
181 outright Completely and without reservation; entirely.
182 overly To an excessive or unnecessary degree.
183 observing The act of watching something closely, or of noting and recording what happens.
184 obstacle Something that blocks progress or makes it harder to move forward, whether physical or figurative.
185 offender A person who commits a crime or breaks the law.
186 ops Short for "operations" — the practical, day-to-day running of a business, military mission, or IT system.
187 Oriental Relating to East Asia or, historically, the broader region east of Europe.
188 ounce A unit of weight equal to one sixteenth of a pound (about 28.3 grams), used for everyday measurements like foo...
189 overlooked Not noticed or given the attention it deserves.
190 Oakland The eighth-largest city in California, seat of Alameda County, and also the name of several smaller towns acro...
191 Omar A male given name of Arabic origin, historically borne by the second caliph of Islam.
192 onset The point at which something, especially an illness or a change, first begins.
193 organism A complete, living individual thing, such as an animal, plant, fungus, or microbe.
194 oops Used to acknowledge a small mistake or accident.
195 Onions A Welsh surname originating as a patronymic form of the given name Einion.
196 opener A tool designed to open something, such as a can or bottle.
197 oracle In ancient religion, a shrine or priest through whom a god was believed to answer questions or give prophecy —...
198 overlap To extend over part of something else, partly covering it.
199 overweight Weighing more than is considered healthy for one's height and build.
200 outdoors Not inside a building; in the open air.
201 overthrow To remove a government or leader from power by force.
202 Otto A male given name of Germanic origin.
203 ole An exclamation shouted to cheer on a performer, bullfighter, or sports team.
204 omega The final letter of the Greek alphabet, symbolizing an ending or the last in a series.
205 outrage Strong anger or indignation caused by something shocking or unfair.
206 outrageous Shockingly excessive, unacceptable, or unjust.
207 offline Not connected to a network, especially the internet.
208 ow An exclamation of sudden pain.
209 obsolete No longer used because something newer or better has replaced it.
210 oi Used to get someone's attention, often sharply, or to express annoyance or surprise.
211 onwards British spelling variant of onward, meaning continuing forward or from a point in time.
212 obese Very overweight, to a degree that is unhealthy.
213 optimism A tendency to expect good things to happen or to see the positive side of a situation.
214 OG Original, authentic, or old-school; the real or first version of something.
215 ordained Officially established or decreed by an authority.
216 outgoing Friendly, sociable, and comfortable meeting new people.
217 outskirts The outer areas of a town or city, away from its center.
218 oppressed Kept down or treated unjustly by a more powerful group or authority.
219 optimization The process of making something — a system, design, or process — work as well as possible.
220 ottoman A low, padded piece of furniture used as a footstool or extra seat, usually without arms or a back.
221 ouch Used to express sudden physical pain.
222 outreach Efforts by an organization to connect with and provide services to people in the community.
223 oxide A chemical compound formed when oxygen combines with another element.
224 optic Relating to the eye or to vision.
225 outdated No longer current, useful, or fashionable; old-fashioned.
226 oasis A fertile spot with water in the middle of a desert.
227 obedience The act of following instructions, rules, or authority.
228 offend To hurt someone's feelings or upset them, often unintentionally.
229 outset The very beginning of something.
230 optimum The most favorable point or amount achievable under a given set of conditions.
231 orbital Relating to an orbit, such as that of a moon, planet, or spacecraft.
232 organising The British spelling of the act or process of arranging something.
233 orphan A child whose parents have both died (or, more loosely, abandoned them).
234 Osborne An English surname and given name of Germanic origin, also the name of several places including a former royal...
235 outsiders People who do not belong to a particular group, community, or place.
236 om A sacred syllable chanted in Hindu, Buddhist, and Jain meditation and prayer.
237 omitted Left out; not included, whether by accident or on purpose.
238 overcoming The act of successfully dealing with or defeating a difficulty.
239 overhaul A thorough repair, renovation, or revision of something.
240 overlapping Partly covering, coinciding with, or sharing something else.
241 oversee To supervise or take responsibility for a person, project, or process.
242 oo The Greek letter omega (Ω, ω), sometimes written this way to show its long "o" sound.
243 orgasm The peak of sexual pleasure, occurring at the climax of sexual activity.
244 oyster A soft-bodied shellfish that lives inside a hard, rough shell, often eaten raw and sometimes producing pearls.
245 OC Informal shorthand meaning "of color", used to describe people who are not white.
246 Olivier A French surname and given name, equivalent to the English Oliver.
247 onboard On or inside a ship, aircraft, train, or other vehicle.
248 organise The standard British spelling of "organize" — to arrange or coordinate something.
249 outward Relating to the outside or exterior; visible on the surface.
250 oaks A famous horse race for three-year-old fillies, run each year at Epsom in England.
251 offending Guilty of a wrongdoing; the one responsible for a problem.
252 organizer A person who plans and arranges the details of an event.
253 Oslo The capital and largest city of Norway, formerly called Christiania.
254 overload To load something with more than it can safely or properly handle.
255 obligatory Required by rule, law, or custom; compulsory.
256 orderly Neat, tidy, and well arranged.
257 orient To figure out your position or direction, or to position something to face a certain way.
258 outsider A person who does not belong to a particular group or community.
259 oddly In a strange or unexpected way.
260 orchard A piece of land planted with fruit or nut trees, or the trees growing there.
261 overdose A dangerously excessive dose of a drug or medicine.
262 obstruction Something that blocks a path, passage, or process.
263 openness A willingness to consider new ideas, people, or experiences.
264 opium An addictive narcotic drug made from the dried sap of the opium poppy, containing morphine and other alkaloids...
265 ordeal A very difficult, painful, or exhausting experience.
266 outlaw A person who has broken the law and is hiding or on the run from it.
267 overlook To fail to notice something, or to miss it despite it being there.
268 ozone A form of oxygen with three atoms per molecule instead of the usual two, found in a protective layer high in t...
269 ox A castrated adult male of domestic cattle, traditionally used to pull carts or ploughs.
270 obligated Required to do something because of a duty, promise, or rule.
271 originate To come into existence, or to have a particular starting point.
272 overwhelmingly To a very great extent; by far the largest amount or degree.
273 octopus A soft-bodied sea creature with eight arms lined with suckers and no internal shell.
274 odyssey A long, eventful journey, especially one full of challenges.
275 Omaha The largest city in Nebraska, United States.
276 onward Moving or directed forward, or further ahead in time.
277 Ons A feminine given name of Arabic origin.
278 onstage Taking place on the visible part of a stage, in front of an audience.
279 oooh A stretched-out version of "ooh," used to show strong surprise, admiration, or interest.
280 Oprah A female given name, a variant of the biblical name Orpah, now widely associated with media figure Oprah Winfr...
281 optics The branch of physics that studies light and vision.
282 overboard Over the side of a boat and into the water.
283 override To take priority over, or cancel out, an existing decision, rule, or system.
284 obscene Offensive to accepted standards of decency, often in a sexual way.
285 oppressive Unjust and harsh; ruling or treating people cruelly.
286 Orion A well-known constellation on the celestial equator, easily spotted by its three-star "belt," and containing t...
287 overdue Later than expected or scheduled; past the point at which something should have happened.
288 Oswald A masculine given name of Old English origin, borne by two English saints and used as a surname.
289 overrated Praised or valued more highly than it actually deserves.
290 Owens A Welsh surname, meaning "son of Owen".
291 originality The quality of being new, inventive, and not copied from anyone else.
292 obsessive Showing an extreme, excessive focus on one thing, often in an unhealthy way.
293 oats The grains harvested from the oat plant, used as food or livestock feed.
294 ominous Suggesting that something bad is about to happen; threatening or foreboding.
295 omission The act of leaving something out, or something that has been left out.
296 overrun To spread over or invade a place in large numbers, often taking full control of it.
297 objectively In a way based on facts rather than personal feelings.
298 ooo A written stand-in for "hugs," typically added at the end of a text message or letter, often paired with "xxx"...
299 od To take a dangerous excess of a drug; to overdose.
300 odor A smell, whether pleasant or unpleasant.