Thesaurus — Synonyms & Antonyms

oaf

galoot, imbecile, lout, moron, fool

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oak

hardwood, timber

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oasis

haven, refuge, sanctuary

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oath

promise, affirmation, profanity, curse, expletive

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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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obese

overweight, corpulent, stout

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obesity

overweight (as a related state)

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obey

defer to, toe the line, hearken, mind, accede

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object

thing, item, article, entity, artifact

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objection

protest, dissent, opposition, exception, demurral

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objective

unbiased, impartial, factual, goal, aim

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objectivity

objectiveness

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obligation

duty, responsibility, commitment, requirement, liability

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obligatory

bounden, mandatory, incumbent

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obliged

indebted, beholden, compelled, bound, thankful

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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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obscure

little-known, hidden, cryptic, murky, veiled

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observation

remark, comment, watching, scrutiny, note

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observatory

planetarium, star-gazing station, observatorium

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observe

watch, monitor, notice, obey, remark

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observed

noticed, noted, witnessed, watched, recorded

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observer

onlooker, spectator, watcher, bystander, witness

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observing

watchful, attentive, perceptive, vigilant, noticing

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obsess

fixate

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obsessed

fixated, preoccupied, consumed, infatuated, gripped

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obsession

fixation, preoccupation, compulsion, mania, fascination

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obsolete

anachronistic, antediluvial, antediluvian, antiquated, antique

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obstacle

barrier, hindrance, impediment, stumbling block, hurdle

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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

obstacle, barrier, barricade, block, hindrance

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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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occupational

job-related, work-related, vocational, career-related

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occupied

engaged, taken, in use, filled, tied up

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occupy

inhabit, reside in, fill, engage, absorb

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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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occurring

happening, arising, taking place, appearing, unfolding

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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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ocular

optic, visual, ophthalmic, eyepiece

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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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oddity

anomaly, curiosity, peculiarity, quirk, freak

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oddly

strangely, curiously, peculiarly, unusually

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odds

chances, likelihood, probability

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Odin

All-Father, Wotan, Woden, Odhin, Odhinn

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odious

repugnant, repellent, loathsome, detestable, abhorrent

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odour

smell, scent, aroma, stench, fragrance

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odyssey

quest, expedition, trek, voyage

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off

deactivated, inoperative, powered down, shut down, aside

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offence

crime, misdemeanour, wrongdoing, violation, transgression

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offend

upset, annoy, displease, abuse, affront

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offender

lawbreaker, culprit, wrongdoer, perpetrator, transgressor

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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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offline

disconnected, unplugged, off the grid, in person

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offset

cancel out, neutralize, negate, counterweight, make up for

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offshore

seaward, overseas, foreign, marine, external

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offspring

young, progeny, descendants, issue, brood

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often

frequently, regularly, repeatedly, commonly, usually

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OG

original, authentic, old-school, real deal

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OH

ah, ooh, wow, gosh, oh dear

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oi

hey, oy

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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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OL

open circuit

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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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Olds

folks, parents, elders, seniors, oldies

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ole

bravo, hooray

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olive

olive-green

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Olivia

liv, livvy, ollie

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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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Omar

umar

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omega

finale, culmination, endpoint, last letter

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omen

augury, auspice, foreshadowing, foretoken, forewarning

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OMG

oh my gosh, wow, gosh, goodness, good heavens

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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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onboard

aboard, integrate, induct, orient, assimilate

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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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Onion

bermudian

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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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onset

commencement, inception, first appearance

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onto

on, upon, on top of, over, atop

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onwards

forward, ahead, forth

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oo

omega, o-o

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ooh

wow, ah

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oops

whoops, my bad

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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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opener

curtain-raiser, starter, opening act, lead-off, kickoff

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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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operative

functioning, in force, agent, secret agent

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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

challenge, be against, fight, check, bar

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opposed

against, hostile, resistant, antagonistic, contrary

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opposing

rival, conflicting, contrary, adversarial, contending

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opposite

facing, across from, opposing, other, antipodean

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