Thesaurus — Synonyms & Antonyms

oaf

galoot, imbecile, lout, moron, fool

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oak

hardwood, timber

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oath

pledge, vow, avowal

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oats

haver

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Oaxaca

Oaxaca City

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obedience

submission, hearsomeness

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obelisk

aguilla, pylon, stela

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obey

hearken, mind, accede, assent, acquiesce

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object

thing, item, article, entity, artifact

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objective

unbiased, impartial, factual, goal, aim

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objectivity

objectiveness

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obligatory

bounden, mandatory, incumbent

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oblique

slash

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oblivion

forgetness

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obscene

adult, bawdy, blue, cheeky, dirty

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observation

remark, comment, watching, scrutiny, note

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observatory

observatorium

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observed

noticed, noted, witnessed, watched, recorded

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obsess

fixate

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obsolete

anachronistic, antediluvial, antediluvian, antiquated, antique

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obstinacy

conviction, insistence, recalcitrance, stubbornness, tenacity

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obstinate

persistent, stubborn, pertinacious, adamant, ardent

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obstruct

barricade, block, choke, clog, close off

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obstruction

block, hindrance, impedance, roadblock, stop

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obtain

get, acquire, gain, secure, procure

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obtuse

obtuse-angled, blunt, dull

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obvious

clear, evident, apparent, plain, self-evident

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obviously

certainly, of course, undoubtedly, naturally, clearly

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occasion

event, instance, function, affair, opportunity

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occasional

infrequent, sporadic, intermittent, irregular, periodic

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occasionally

periodically, infrequently, at times, ever and anon, every once in a while

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occupant

occupier

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occupation

employment, trade, career, business, pursuit

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occupied

engaged, taken, in use, filled, tied up

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occupy

go to bed with, sleep with

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occur

come about, arise, transpire, crop up, materialise

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occurrence

affair, befalling, episode, event, goings-on

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ocean

sea, the deep, the high seas, open water, the seven seas

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octagon

8-gon

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octopus

polypus

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odd

strange, unusual, peculiar, weird, curious

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oddball

odd duck, strange fish, queer fish, weirdo

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odds

chances, likelihood, probability

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Odin

All-Father, Wotan, Woden, Odhin, Odhinn

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off

deactivated, inoperative, powered down, shut down, aside

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offend

abuse, affront, burn, carry, cut down

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offense

violation, transgression, misdeed, wrongdoing, breach

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offensive

insulting, rude, hurtful, disrespectful, objectionable

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offer

present, propose, put forward, tender, extend

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offering

gift, contribution, donation, present, product

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offhand

extemporaneous, off-the-cuff

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office

workplace, workspace, bureau, headquarters, premises

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officer

official, officeholder, administrator, functionary, agent

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official

authorized, formal, certified, authoritative, accredited

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officially

formally, legally, authoritatively, properly, on the record

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offset

compensate for, counterbalance, countervail, equivalence, offlay

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often

frequently, regularly, repeatedly, commonly, usually

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OH

ah, ooh, wow, gosh, oh dear

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oil

petroleum, lubricant, fat, grease, crude oil

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oink

grunt

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ointment

salve, unguent, pomatum, pomade, pomate

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OK

all right, fine, acceptable, satisfactory, adequate

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okra

bandikai, bhindi, gumbo, ladyfinger

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old

mature, antique, vintage, long-standing, ancient

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olden

historical, eldern

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older

elder, senior, more aged, longer-established, earlier

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oldest

eldest, first-born, senior, most senior

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oldie

classic hit

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Olympic

world-class, top-level, elite

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Olympics

Olympic Games, the Games, Summer Olympics, Winter Olympics, Olympiad

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omen

augury, auspice, foreshadowing, foretoken, forewarning

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ominous

augurous, baleful, bodeful, boding, dire

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omit

miss out, except, exclude, leave out, miss off

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on

upon, atop

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once

one time, a single time, on one occasion, just once, oncet

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one

1, unity, single, unit, yan

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oneness

onehead, oneship, singleness, unicity, unitude

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ones

first team, first eleven, senior squad, first XI, senior side

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ongoing

continuing, in progress, unfinished, running, developing

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online

connected, web-based, digital, virtual, networked

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only

sole, single, solitary, lone, unique

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onto

on, upon, on top of, over, atop

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op

promote, make an operator, grant admin rights, give operator status, mod

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opaque

adiaphanous, nontransparent, opacous, opacular, thick

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open

unlocked, unsealed, ajar, unobstructed, clear

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opened

unsealed, unlocked, unfastened, unwrapped, ajar

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opening

hole, aperture, space, breach, mouth

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openly

frankly, candidly, overtly, plainly, freely

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opera

opera house, music drama, lyric drama

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operate

run, work, use, control, manage

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operated

run, powered, controlled, driven, worked

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operating

running, functioning, working, active, in operation

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operation

functioning, working, running, performance, action

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operational

functional, working, up and running, in service, active

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operations

activities, workings, running, processes, functioning

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operator

controller, handler, technician, machinist, conductor

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opinion

view, belief, judgment, viewpoint, standpoint

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opium

aunti/aunti Emma, big O, chandu, Chinese tobacco, dopium

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opponent

rival, competitor, contender, challenger, foe

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opportune

proper, timesome

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opportunity

chance, opening, occasion, break, window

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oppose

be against, fight, check, bar, block

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opposed

against, hostile, resistant, antagonistic, contrary

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opposite

facing, across from, opposing, other, antipodean

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opposition

resistance, disagreement, defiance, hostility, objection

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oppressive

harsh

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optimum

pessimum

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option

selection, pick, preference, alternative, choice

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or

otherwise, or else, alternatively

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oracle

ariolater, Chaldean, clairvoyant, divinator, diviner

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oral

spoken, verbal, vocal, unwritten, uttered

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orange

amber, coral, ginger, gold, golden brown

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orator

speaker

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orb

globe

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orchid

orchidea

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order

arrangement, sequence, organization, layout, structure

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ordered

organised, orderly, tidy, neat, systematic

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orderly

trim, well-kept, all Sir Garnet, Bristol fashion and shipshape, in order

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ordinarily

commonly, most of the time, routinely

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ordinary

normal, usual, common, everyday, standard

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ore

lode, mineral deposit, vein, deposit

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organ

pipe organ, harmonium, viscus

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organic

natural, living, biological, carbon-based, plant-based

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organisation

body, institution, association, arrangement, structure

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organism

being, biont

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organization

institution, body, association, group, company

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organize

adapt, adjust, apportion, arrange, assort

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organized

orderly, methodical, systematic, tidy, structured

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organizer

chief, controller, comptroller, foreman, head

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orgasm

acme, big O, completion, happy ending, pleasure

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oriented

focused, geared, directed, centered, aligned

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origin

source, beginning, root, start, foundation

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original

authentic, genuine, first, initial, earliest

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originally

at first, in the beginning, to begin with, formerly, initially

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originate

initiate, take shape

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orthodox

halal, homodox, kosher, by the book, allowed

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orthodoxy

homodoxy

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os

esker, orifice, opening, bone, ridge

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Oscar

academy award, statuette, gong

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osprey

fish eagle, fish hawk, orfray, ossifrage, osspringer

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other

different, alternative, additional, remaining, further

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others

other people, the rest, everyone else, the remainder, the others

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otherwise

differently, in another way, or else, in other respects, if not

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Ottawa

National Capital Region, NCR, Ottawa-Hull, Ottawa-Gatineau, O-town

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ought

should, must, need to

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ounce

oz., fl. oz.

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ourselves

usself, weself

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out

outside, outdoors, forth, extinguished, absent

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outcast

abject, castaway, deviant, exile, fremd

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outcome

result, consequence, upshot, effect, aftermath

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