O
Oath.Curse, imprecation, profanity, swearing, adjuration, affidavit, anathema, ban, blasphemy, denunciation, execration, malediction, vow, reprobation, sworn statement.
Ant.Blessing, benediction, benison.
Obdurate.Firm, unbending, inflexible, unyielding, obstinate, stubborn, impenitent, callous, unfeeling, insensible.
Ant.Yielding, teachable, tender, docile, amenable, flexible, softened.
Obedience.Submission, duty, compliance, respect, dutifulness, subservience.
Ant.Resistance, rebellion, transgression, disobedience, antagonism, insubordination.
Obedient.Dutiful, respectful, compliant, submissive, humble, yielding, obsequious, modest, docile.
Ant.Disrespectful, undutiful, arrogant, hard, unyielding, obstinate, obdurate, stubborn.
Obesity.Fatness, corpulence, fleshiness, corpulency.
Ant.Leanness, thinness.
Obey.Submit, yield, comply.
Ant.Resist, refuse, disobey.
Object,n.Reality, fact, existence, phenomenon; aim, intention, end, purpose, appearance, motive, design, sight, view, goal.
Ant.Subject, idea, fancy, conception.
Objective.Outward, external, extrinsic, concrete, universal, actual, positive, real.
Ant.Subjective, intrinsic, abstract, notional.
Oblation.Offering, gift, sacrifice, contribution, presentation.
Ant.Spoliation, sacrilege, withholding, refusal.
Obligation.Responsibility, engagement, contract, agreement, bond, covenant, stipulation, necessity, debt, duty, compulsion.
Ant.Choice, freedom, assurance, promise, declaration, intention.
Oblige.Bind, please, gratify, accommodate, favor, constrain, compel, force, coerce, benefit, necessitate, obligate.
Ant.Release, acquit; persuade, induce; annoy, disoblige.
Obliging.Civil, courteous, complaisant, kind, considerate, accommodating, compliant.
Ant.Discourteous, inconsiderate, rude, disobliging, unaccommodating.
Oblique.Indirect, slanting, inclined, perverse, disingenuous, diagonal, divergent, angular.
Ant.Straightforward, rectilineal.
Oblivion.Forgetfulness, disremembrance.
Ant.Memory, reminiscence, remembrance, recollection, celebration, commemoration.
Obloquy.Censure, odium, contumely, reproach, gainsaying, reviling, calumny, slander, detraction.
Ant.Praise, acclamation, encomium, panegyric.
Obnoxious.Odious, detrimental, blameworthy, pernicious, offensive.
Ant.Pleasant, grateful, independent, wholesome, beneficial, salutary.
Obscure,a.Abstruse, deep, involved, difficult, hidden, profound, mysterious, ambiguous, unintelligible, cloudy, complex, complicated, dark, darksome, dense, dim, doubtful, intricate, dusky, indistinct, enigmatical, incomprehensible, muddy, turbid, shadowy, misty, unknown, secluded, unascertained, remote.
Ant.Clear, luminous, distinct, lucid, plain, plain-spoken, intelligible, prominent, eminent.
Obsequious.Servile, cringing, fawning, compliant, submissive, deferential, sycophantic, flattering.
Ant.Impudent, self-assertive, independent, arrogant, insubmissive, haughty, proud.
Observance.Observation, heeding, form, practice, custom, attention, celebration, ceremony, performance.
Ant.Inobservance, inattention, disuse, disregard, disrespect, omission, unceremoniousness, informality.
Observant.Observing, watchful, attentive, regardful, obedient, mindful, careful, heedful.
Ant.Unmindful, disobedient, disregardful, heedless.
Observation.Contemplation, remark, study, notice, view, conclusion, judgment, attention, comment, note, observance.
Ant.Inattention, oversight, silence, ignorance, inadvertence.
Observe.Remark, note, watch, heed, see, discover, attend, comment.
Ant.Overlook, misconceive, misunderstand.
Obsolete.Disused, ancient, neglected, antiquated, archaic, effete, past, old-fashioned, old, rare, obsolescent.
Ant.Fashionable, modern, current, customary, new, novel, extant.
Obstacle.Impediment, obstruction, difficulty, hindrance, barrier, check.
Ant.Course, proceeding, career, advancement, progress.
Obstinacy.Pertinacity, firmness, resoluteness, inflexibility, persistency, perverseness, contumacy.
Ant.Flexibility, docility, complaisance.
Obstinate.Perverse, obdurate, intractable, determined, stubborn, resolved, resolute, inflexible, unyielding, intractable, indomitable, unflinching, contumacious, decided, dogged, mulish, heady, headstrong, fixed, firm, immovable, opinionated, persistent, pertinacious, refractory, unconquerable.
Ant.Pliant, docile, submissive, dutiful, gentle, obedient, compliant, tractable, yielding, amenable, complaisant, irresolute, wavering, undecided, pliable, teachable.
Obstruct.Bar, barricade, hinder, oppose, impede, stay, stop, arrest, check, embarrass, clog, choke, retard, interrupt.
Ant.Aid, facilitate, accelerate, forward, promote, clear,advance, open, pave the way for, further, free, expedite.
Obstruction.Obstacle, barrier, bar, impediment, check, clog, hindrance.
Ant.Course, proceeding, advancement, progress, career.
Obtain.Attain, gain, procure, acquire, earn, win.
Ant.Lose, forfeit, surrender, forego.
Obtrude.Intrude, force, interfere, thrust.
Ant.Suggest, hint, insinuate; retire, withdraw.
Obtuse.Blunt, dull, stupid, unintelligent, stolid.
Ant.Keen, quick, sharp, intelligent, acute, clever.
Obverse.Opposite, facing.
Ant.Hinder, reverse.
Obvious.Opposing; plain, evident, clear, manifest, apparent, discovered, perceived, open, explicit, patent.
Ant.Remote, obscure, far-fetched, involved, latent.
Occasion,v.Cause, produce, create, induce, originate, furnish, compose, constitute, generate.
Occasionally.Sometimes, casually, rarely.
Ant.Always, constantly, regularly, frequently.
Occult.Secret, concealed, hidden, unknown, invisible, latent, eclipsed, unrevealed, mysterious.
Ant.Developed, plain, exposed, patent, clear, familiar, open.
Occupancy.Possession, occupation, tenury.
Ant.Eviction, ejection, dispossession.
Occupation.Occupancy, avocation, employment, engagement, vocation, calling, office, trade, profession.
Ant.Idleness, leisure, vacancy, vacation, abandonment, resignation.
Occupy.Possess, hold, employ, fill.
Ant.Abandon, release, desert, surrender, vacate, concede.
Occur.Happen, appear, meet, befall, betide, take place.
Ant.Threaten, pass, impend.
Occurrence.Event, happening, incident, affair, adventure, circumstance, transaction, episode.
Ant.Cause, antecedent, inducement, predisposition, tendency, contribution.
Odd.Quaint, unmatched, queer, unusual, eccentric, fantastical, droll, comical, singular, peculiar.
Ant.Common, usual, regular, normal, matched.
Odious.Hateful, detestable, disgusting, abominable, repulsive, forbidding, unpopular, invidious, loathsome.
Ant.Pleasing, pleasant, acceptable, agreeable, grateful, delectable, bewitching, charming.
Odium.Hatred, abhorrence, detestation, antipathy, unpopularity, offensiveness.
Ant.Welcome, acceptableness, popularity.
Odor.Scent, perfume, smell, fragrance, aroma, redolence; trail, effluvium, fume.
Ant.Inodorousness.
Odorous.Fragrant, perfumed, balmy, aromatic, odorant.
Ant.Scentless, inodorous; fetid.
Offend.Displease, affront, harm, pain, annoy, transgress.
Ant.Please, gratify, conciliate.
Offense.Umbrage, misdeed, delinquency, transgression, fault,affront, indignity, outrage, insult.
Ant.Defense, guiltlessness, innocence.
Offensive.Disagreeable, obnoxious, distasteful, impertinent, disgusting, rude, saucy, opprobrious, insulting, insolent, attacking, abusive, invading, assailant.
Ant.Defensive, pleasing, grateful, savory.
Offer.Propose, propound, tender, sacrifice, immolate, undertake, attempt, try, proffer.
Ant.Withhold, withdraw, retract, retain, alienate, divert.
Offhand.Instant, ready, extemporaneous, unpremeditated, unstudied, impromptu.
Ant.Premeditated, elaborate, studied, thought-out.
Office.Service, duty, custom, position, charge, authority, function, business.
Ant.Leisure, vacancy, sinecure, resignation.
Officer.Official, functionary, director, dignitary, manager, administrator.
Ant.Member, servant, private, employee.
Official,a.Administrative, authoritative, functional, professional.
Ant.Private, unofficial, unprofessional.
Officiate.Act, serve, perform.
Ant.Witness, retire.
Officious.Impertinent, meddlesome, interfering, forward, intrusive, pushing.
Ant.Negligent, backward, remiss; retiring, modest.
Often.Frequently, repeatedly, commonly, many times, not seldom.
Ant.Infrequently, seldom, rarely.
Old.Aged, ancient, primitive, pristine, antique, antiquated, old-fashioned, obsolete; senile; gray, hoary, olden, immemorial, time-honored, decrepit, elderly, patriarchal, remote, venerable, time-worn.
Ant.Youthful, childlike, young; recent, modern, fresh, new-fashioned, current.
Omen.Prognostic, augury, presage, sign, portent, foreboding.
Ant.Fulfilment, event, occurrence, realization.
Ominous.Significant, portentous, unpropitious, threatening, inauspicious, foreboding, premonitory, suggestive.
Ant.Encouraging, auspicious, propitious.
Omit,v.Leave out, neglect, forbear, fail, miss, overlook.
Ant.Consider, observe, notice, attend, regard.
Omnipotent.All-powerful, irresistible, Almighty.
Ant.Powerless, inefficient, impotent.
Omniscient.All-knowing, infallible, all-wise.
Ant.Shortsighted, fallible, ignorant.
One.Single, individual, solitary, certain, undivided, common, united, unitary.
Ant.Many, several; few.
Onerous.Burdensome, oppressive, heavy, toilsome, difficult, laborious, responsible.
Ant.Light, easy, trivial.
Only,ad.Solely, singly, exclusively, merely, barely, wholly.
Ant.Among, amongst, together, collectively.
Only,a.Single, sole, alone, preëminent, chief.
Ant.Many, together, several, mixed.
Onset,Onslaught. Assault, attack, storming, aggression, invasion.
Ant.Repulse, resistance, protection, shelter, support, defense.
Onward.Forward, in advance, ahead.
Ant.Aback, astern, backward.
Opaque.Impervious, not transparent, obscure, unintelligible.
Ant.Pellucid, translucent, transparent, obvious, clear, intelligible, perspicuous.
Open,v.Unclose, disclose, expose, explain, begin, commence, initiate.
Ant.Close, shut, cover, conceal; conclude, terminate; misinterpret, mystify.
Open,a.Unclosed, uncovered, unprotected, exposed, plain, obvious, evident, public, artless, candid, free, available, accessible, undisguised, ingenuous.
Ant.Closed, barred, inaccessible, unavailable, reserved, shut, secreted.
Opening.Aperture, hole, space, breach, gap, fissure; start, inauguration, commencement, initiation, beginning; opportunity.
Ant.Obstruction, stop-gap, termination, enclosure, close, end, conclusion, inopportunity, unseasonableness.
Operation.Agency, action, exercise, production, influence, force, performance, result, procedure, effect, execution.
Ant.Failure, uselessness, futility, ineffectiveness, inefficiency, powerlessness, inaction, cessation, rest.
Opinion.Persuasion, idea, sentiment, view, conviction, judgment, notion, impression, estimation.
Ant.Evidence, argument, inquiry, speculation, investigation, pleading.
Opponent.Antagonist, foe, adversary, enemy, rival.
Ant.Helper, assistant, accomplice, ally.
Opportune.Timely, seasonable, convenient, ready, suitable, auspicious, meet, appropriate.
Ant.Untimely, unseasonable, inopportune, infelicitous.
Opportunity.Occasion, convenience, occurrence, turn, opening.
Ant.Lapse, omission, inopportuneness, contre-temps.
Oppose.Combat, withstand, contradict, deny, gainsay, oppugn, contravene, check, obstruct.
Ant.Aid, abet, support, advance, expedite.
Opposite.Facing, contrary, repugnant, antagonistic, adverse, counter, contradictory, opposed.
Ant.Agreeing, coincident, harmonious, conformable, suiting, fitting, accordant.
Opposition.Restraint, defeat, resistance, hostility, obstacle, obstruction, animosity.
Ant.Sympathy, harmony, concord, alliance, congeniality.
Oppress.Impose, weigh down, burden, grind, persecute, overwhelm, crush, overpower, subdue.
Ant.Encourage, assist, support, befriend.
Oppression.Cruelty, tyranny, hardship, injustice, severity.
Ant.Kindness, mercy, justice, clemency, leniency.
Oppressive.Heavy, oppressing, rigorous, tyrannical, unjust, extortionate, grinding.
Ant.Light, easy, compassionate, just, humane, generous.
Opprobrium.Disgrace, infamy, reproach, contempt, scandal, obloquy, odium.
Ant.Popularity, welcome, acceptableness.
Option.Choice, preference, selection, discretion, wish, election.
Ant.Compulsion, necessity, obligation.
Opulence.Wealth, riches, fortune, affluence, independence.
Ant.Poverty, impecuniosity, indigence, want.
Oracle.Revelation; prophet, angel.
Ant.Empiricism, pragmatism.
Oracular.Prophetic, ominous, portentous; authoritative, positive, dogmatical; wise, grave, sage; obscure, equivocal, ambiguous.
Ant.Cautious, modest, vacillating, diffident.
Oral.Verbal, unwritten, vocal, spoken, traditional.
Ant.Documentary, written.
Oration.Address, speech, discourse, harangue, lecture, disputation, declamation, effusion.
Ant.Reasoning, suggestion, insinuation.
Oratory.Eloquence, rhetoric, elocution, declamation.
Ant.Hesitation, stammering, dulness.
Orb.Sphere, globe, ball; circle, orbit, circuit; disk; revolution.
Orbit.Revolution, path, circuit, sphere.
Ant.Deviation, eccentricity, perturbation.
Ordain.Set, regulate, establish, appoint, decree, constitute, institute, prescribe, dictate.
Ant.Revoke, subvert, cancel, countermand.
Ordeal.Test, trial, experiment, probation, proof, scrutiny, assay, investigation.
Ant.Result, event; argument, evidence, plea, discussion.
Order.Arrangement, system, procedure, method, rule, regulation; command, mandate, rank, direction, grade, class, character, kind, management, injunction, prohibition, requirement, instruction.
Ant.Allowance, consent, leave, permission, permit, liberty, license.
Orderly.Regular, obedient, systematic, quiet, peaceable, methodical, well-regulated.
Ant.Disorderly, riotous, irregular.
Ordinance.Statue, law, edict, decree, rescript, regulation, institute, rule.
Ant.Custom, usage, tradition, fashion.
Ordinary.Normal, usual, common, customary, settled, frequent, wonted, habitual, indifferent, mediocre, plain, commonplace.
Ant.Extraordinary, superior, unusual, uncommon.
Organic.Inherent, fundamental, essential, constitutional, radical, vital; organized, systematized.
Ant.Non-essential, circumstantial, provisional, contingent, inorganic, secondary.
Organization.Structure, form, construction; organism.
Ant.Disorganization.
Organize.Arrange, constitute, shape, adjust, frame, establish, construct, systematize.
Ant.Disorganize, dismember, disband, break up, annul.
Origin.Source, rise, commencement, spring, fountain, derivation, cause, root, foundation.
Ant.Termination, conclusion, extinction.
Original.Primitive, new, primary, pristine, genuine, inventive, peculiar, initiatory,primordial, ancient, former, first.
Ant.Subsequent, later, derivative, modern, terminal.
Originate.Begin, cause, commence, start, invent, create, spring, rise.
Ant.Prosecute, conduct; conclude, finish, end.
Ornament.Decoration, embellishment, adornment.
Ant.Disgrace, brand, disfigurement, detraction.
Ornate.Adorned, beautiful, embellished, decorated, elaborate, rich, ornamented.
Ant.Bare, bald, nude, plain, naked.
Orthodox.Sound, conventional, approved, correct.
Ant.Heretical, unorthodox, liberal, radical.
Ostensible.Exhibited, avowed, professed, apparent, pretended, declared, manifest, specious, plausible, outward.
Ant.Real, actual, genuine, veritable, concealed, hidden.
Ostentation.Display, boasting, show, boast, vaunting, flourish, pageant, pomp, parade, pageantry.
Ant.Diffidence, modesty, reserve, timidity, shrinking, retirement, quietness, unobtrusiveness.
Ostracism.Banishment, exclusion, expulsion, blackball, excommunication, separation.
Ant.Admittance, enlistment, enrolment; welcome, fellowship.
Outbreak.Outburst, eruption, tumult, commotion, rebellion, insurrection, riot, conflict.
Ant.Quiet, order, pacification, subsidence, quelling.
Outcast.Exile, vagabond, reprobate, castaway, pariah, vagrant.
Outcry.Clamor, tumult, vociferation, alarm, yell, scream, noise.
Ant.Quiet, silence; acclamation, plaudit.
Outer.Outside, outward, external, exterior.
Ant.Inward, inside, internal, interior.
Outlaw.Brigand, bandit, robber, highwayman, marauder, freebooter.
Outlet.Egress, exit, vent.
Ant.Entrance, ingress.
Outline.Contour, sketch, delineation, draft, plan.
Ant.Form, substance, bulk, figure, field, ground, space; object, subject.
Outrage.Outbreak, offense, violence, mischief, abuse, affront, insult, indignity.
Ant.Favor; self-restraint, self-control.
Outrageous.Violent, furious, excessive, exorbitant, wanton, atrocious, monstrous, nefarious, heinous.
Ant.Moderate, reasonable, justifiable.
Outskirts.Border, edge, outpost, precincts, environs, suburbs.
Ant.Interior, center, bulk, mass, body, heart.
Outstanding.Uncollected, undischarged, unappropriated, unpaid; projecting; opposing.
Ant.Collected, appropriated, gathered, paid; supporting; reëntrant.
Outward.Out, outer, external, exterior, public, visible, sensible, extraneous, superficial, apparent, extrinsic, ostensible.
Ant.Internal, intrinsic, inward, withdrawn.
Overcast.Cloudy, lowering, obscured, murky, darkened, overspread, eclipsed.
Ant.Cloudless, clear, luminous.
Overcome.Vanquish, conquer, surmount, excel, overthrow, subjugate, rule, domineer over.
Ant.Lose, forfeit, surrender, fail, submit, retreat, succumb.
Overflow,n.Redundancy, inundation, deluge, exuberance, superabundance.
Ant.Subsidence, deficiency, exhaustion.
Overruling.Governing, controlling, superior, predominant, directing, prevailing.
Ant.Governed, controlled, inferior, subordinate.
Oversight.Charge, superintendence, management, supervision, command, care, watchfulness, surveillance, control, inspection, direction, watch; omission, error, inadvertence.
Ant.Mismanagement, negligence, disregard, slight; particularity, attention to minutiæ.
Overt.Public, manifest, apparent, deliberate, open, avowed.
Ant.Covert, secret, furtive, clandestine, implied.
Overthrow.Upset, ruin, demolish, destroy, overcome, defeat.
Ant.Restore, reinstate, revive.
Overture.Proposal, proposition, offer, opening, prelude, invitation, advance, initiation.
Ant.Inaction, quiescence.
Overweening.Rash, arrogant, egoistic, vain, haughty, conceited.
Ant.Affable, courteous, sociable, condescending, gracious, polite, approachable.
Overwhelm.Submerge, engulf, immerse, overpower, extinguish, bury, crush, sink, subdue, vanquish, conquer, defeat.
Ant.Raise, reinstate, reëstablish, rescue, extricate.
Owe.Be indebted for, be obliged for, borrow, hypothecate, attribute.
Ant.Repay, requite, defray, liquidate.
Own.Possess, grant, acknowledge, admit, confess, avow.
Ant.Lose, disown, abandon, forfeit, alienate, disinherit, abjure.