Synonyms for Preposterous:

• adj.

  •absurd (adjective)
  • flaky,
  • study at absurd,
  • anachronistic,
  • jokey,
  • campiest,
  • for grins,
  • off the wall,
  • incongruous,
  • campy,
  • eccentric,
  • gagged up,
  • inane,
  • unusual,
  • meaningless,
  • invalid,
  • bizarre,
  • implausible,
  • farcical,
  • contradictory,
  • paradoxical,
  • fooling around,
  • campier,
  • fallacious.
  •balmy (adjective)
  • oddest,
  • mentally incompetent,
  • pottiest,
  • bugged out,
  • pottier.
  •cockeyed (adjective)
  • most strabismic,
  • more canted,
  • crosseyed,
  • squintest,
  • cross eyed,
  • most askance,
  • camest,
  • more strabismic,
  • more askant,
  • most canted,
  • more askance,
  • most askant.
  •crazy (adjective)
  • short sighted,
  • most illconceived,
  • out reason,
  • more illconceived,
  • more impracticable,
  • more derisory,
  • out all reason,
  • more ill-conceived,
  • ill conceived,
  • illconceived,
  • most ill conceived,
  • halfbaked,
  • out of reason,
  • most derisory,
  • most ill-conceived,
  • more ill conceived,
  • in appropriate,
  • half baked,
  • in-appropriate.
  •droll (adjective)
  • more crackup,
  • most crack-up,
  • most crack up,
  • more gelastic,
  • more crack-up,
  • most clownish,
  • more clownish,
  • riotest,
  • more laffer,
  • most comic,
  • most crackup,
  • more crack up,
  • funnier,
  • most gelastic,
  • most laffer.
  •egregious (adjective)
  • egregious,
  • heinous.
  •exaggerated (adjective)
  • caricatural,
  • hyperbolic,
  • sensational,
  • too-too,
  • schmaltzy,
  • overestimated,
  • pretentious,
  • overkill,
  • hammy,
  • over-wrought,
  • highly colored,
  • out of proportion.
  •exorbitant (adjective)
  • un-duest,
  • over-board,
  • most absonant,
  • ex pensive,
  • un-warranted,
  • ex-acting,
  • over ones head,
  • un warranted,
  • over much,
  • over board,
  • unwarranted,
  • ex acting,
  • out sight,
  • over-much,
  • un-duer,
  • more overboard,
  • un due,
  • over one head,
  • priciest,
  • un duest,
  • towering,
  • un-due,
  • pricier,
  • most overboard,
  • out of sight,
  • more absonant,
  • un duer,
  • ex-pensive.
  •extravagant (adjective)
  • more spendthrift,
  • over priced,
  • most spendthrift,
  • over-priced,
  • un balanced,
  • un-balanced,
  • ostentatious,
  • most overpriced,
  • grandiose,
  • more overpriced,
  • un-restrained.
  •extreme (adjective)
  • extra ordinary,
  • stern,
  • out and out.
  •fanciful (adjective)
  • more fairy tale,
  • more curious,
  • un-real,
  • most fancied,
  • pie in sky,
  • more fairy-tale,
  • pie the sky,
  • fictional,
  • more fancied,
  • notional,
  • more fairytale,
  • most fairy-tale,
  • pie sky,
  • most fairytale,
  • castles the air,
  • castles air,
  • most fairy tale.
  •fantastic (adjective)
  • most phantasmagorical,
  • un-likely,
  • more phantasmagorical,
  • mis-leading,
  • un likeliest,
  • un likelier,
  • un-likelier,
  • mis leading,
  • un-likeliest,
  • un likely.
  •far-fetched (adjective)
  • in coherent,
  • in-coherent,
  • hard swallow,
  • far fetched,
  • un convincing,
  • un-convincing,
  • in consequential,
  • in-consequential.
  •foolish (adjective)
  • kooky,
  • ill-considered,
  • imbecilic,
  • halfwitted,
  • cockamamy,
  • nerdy.
  •grotesque (adjective)
  • more antic,
  • grodier,
  • un-canniest,
  • un-canny,
  • more surrealistic,
  • most antic,
  • sur realistic,
  • un-cannier,
  • malformed,
  • un cannier,
  • un canniest,
  • un canny,
  • sur-realistic,
  • most surrealistic,
  • de formed,
  • de-formed.
  •harebrained (adjective)
  • rattlebrained,
  • flighty,
  • emptyheaded.
  •illogical (adjective)
  • in-valid,
  • more casuistic,
  • selfcontradictory,
  • in-consequent,
  • un-tenable,
  • most casuistic,
  • un-scientific,
  • un-substantial,
  • un sound,
  • in valid,
  • in correct,
  • un proved,
  • un connected,
  • un-sounder,
  • most self contradictory,
  • more self contradictory,
  • most sophistical,
  • un sounder,
  • most self-contradictory,
  • un-soundest,
  • un-proved,
  • un tenable,
  • un substantial,
  • more selfcontradictory,
  • irrelevant,
  • unproved,
  • un scientific,
  • un-sound,
  • most selfcontradictory,
  • in-correct,
  • in-conclusive,
  • in consequent,
  • in consistent,
  • more sophistical,
  • in-consistent,
  • more self-contradictory,
  • in conclusive,
  • un-connected,
  • self contradictory.
  •imbecilic (adjective)
  • un earthliest,
  • un earthlier,
  • un-earthlier,
  • un-earthly,
  • un earthly,
  • un-earthliest.
  •impossible (adjective)
  • infeasible,
  • unrealizable,
  • no-win,
  • NOGO,
  • hundred-to-one,
  • not a prayer,
  • no-go,
  • Inexecutable,
  • Noway,
  • unanswerable,
  • unattainable,
  • no-way,
  • irrealizable,
  • unsuitable,
  • uncorrectable,
  • hardly possible,
  • unachievable,
  • objectionable,
  • out of question,
  • unobtainable,
  • no go,
  • contrary to reason,
  • unrecoverable,
  • no way,
  • unworkable.
  •improper (adjective)
  • at odds,
  • unbefitting,
  • off-base,
  • unfitting,
  • Unapt,
  • ill timed,
  • illtimed,
  • inapposite,
  • ill-timed,
  • out-of-season,
  • out-of-place.
  •incredible (adjective)
  • in supposable,
  • in-supposable,
  • in-credible,
  • more incogitable,
  • more insupposable,
  • most incogitable,
  • in cogitable,
  • in-cogitable,
  • incredible,
  • in credible,
  • most insupposable.
  •inordinate (adjective)
  • supererogatory,
  • untempered,
  • unmeasurable,
  • overindulgent,
  • uncurbed.
  •insane (adjective)
  • of unsound mind,
  • moonstruck,
  • off one's rocker,
  • out of mind,
  • schizophrenic,
  • off rocker.
  •irrational (adjective)
  • more off the wall,
  • un-reasoning,
  • un thinking,
  • more cockamamie,
  • un-thinking,
  • more reasonless,
  • dis jointed,
  • most unreasoning,
  • most reasonless,
  • dis-jointed,
  • more unreasoning,
  • dis connected,
  • most off-the-wall,
  • most cockamamie,
  • dis-connected,
  • most off the wall,
  • more off-the-wall,
  • un reasoning.
  •laughable (adjective)
  • more har har,
  • most har har,
  • more harhar,
  • most har-har,
  • most harhar,
  • most jocose,
  • har har,
  • more har-har,
  • facetious,
  • harhar,
  • screamest.
  •loco (adjective)
  • not there,
  • mad as a hatter,
  • sick in the head,
  • nutty as a fruitcake,
  • around the bend,
  • stark raving mad,
  • nutty as fruitcake,
  • crazy as a loon,
  • not all there.
  •lunatic (adjective)
  • whacko,
  • schizoid,
  • psyched out.
  •mad (adjective)
  • un safer,
  • un safe,
  • un-safe,
  • un-safest,
  • un safest,
  • un-safer.
  •monstrous (adjective)
  • in human,
  • most teratoid,
  • more miscreated,
  • dis graceful,
  • more teratoid,
  • most horrifying,
  • in-human,
  • dis-graceful,
  • Miscreated,
  • mis created,
  • most miscreated,
  • mis-created,
  • more horrifying.
  •outlandish (adjective)
  • farout,
  • more outre,
  • un couth,
  • un-couth,
  • most outre.
  •outrageous (adjective)
  • un civilized,
  • out bounds,
  • un-civilized.
  •prohibitive (adjective)
  • Preventing,
  • Proscriptive,
  • financial means conditional,
  • sky-high.
  •rich (adjective)
  • most splitting,
  • more splitting,
  • most side-splitting,
  • most side splitting,
  • more side splitting,
  • most slaying,
  • side splitting,
  • more slaying,
  • more side-splitting.
  •ridiculous (adjective)
  • dubious,
  • weird,
  • curious,
  • comical,
  • foolheaded,
  • oddball,
  • poppycock.
  •silly (adjective)
  • more nitwitted,
  • muddleheaded,
  • most nitwitted,
  • muddle headed,
  • more sheepheaded,
  • most sheepheaded.
  •tall (adjective)
  • more embellished,
  • embellished,
  • most embellished.
  •unapt (adjective)
  • un aptest,
  • un-becoming,
  • un apter,
  • out place,
  • un-aptest,
  • un becoming,
  • un-apter.
  •unattainable (adjective)
  • un attainable,
  • un-attainable.
  •unbefitting (adjective)
  • un befitting,
  • in-decent,
  • in-delicate,
  • in-decorous,
  • in decent,
  • out line,
  • un-befitting,
  • in delicate,
  • in decorous.
  •unbelievable (adjective)
  • past belief,
  • full of holes,
  • lamebrained,
  • won't wash,
  • for the birds,
  • won't hold water.
  •unconscionable (adjective)
  • un godlier,
  • un-holy,
  • un principled,
  • un conscionable,
  • un-fair,
  • more amoral,
  • un-conscionable,
  • un just,
  • un fairer,
  • un holiest,
  • un fairest,
  • un scrupulous,
  • dis-honest,
  • un justest,
  • un fair,
  • most amoral,
  • un-godliest,
  • un-godly,
  • un-holiest,
  • un-scrupulous,
  • un ethical,
  • un holy,
  • un-juster,
  • un juster,
  • un-fairest,
  • un-ethical,
  • un-holier,
  • un-principled,
  • un godliest,
  • amoral,
  • un-godlier,
  • un-justest,
  • un godly,
  • un-fairer,
  • un-just,
  • dis honest,
  • un holier.
  •unheard-of (adjective)
  • Unrenowned,
  • unheard of,
  • little known,
  • little-known.
  •unnatural (adjective)
  • un natural,
  • most puton,
  • more put on,
  • in-sincerest,
  • un-conforming,
  • madeup,
  • most put on,
  • super-natural,
  • most concocted,
  • more unconforming,
  • in sincerest,
  • in-sincerer,
  • more staged,
  • un-natural,
  • un conforming,
  • more imitation,
  • most unconforming,
  • most imitation,
  • in-sincere,
  • super natural,
  • in sincerer,
  • un accountable,
  • most staged,
  • more put-on,
  • in sincere,
  • more concocted,
  • puton,
  • makebelieve.
  •unrealizable (adjective)
  • un realizable,
  • un-realizable.
  •unreasonable (adjective)
  • full hot air,
  • quirky,
  • un reasoned,
  • un-reasoned,
  • un reasonable,
  • un-reasonable.
  •unthinkable (adjective)
  • in supportable,
  • un thinkable,
  • beyond possibility,
  • un-ordinary,
  • un-thinkable,
  • in-supportable,
  • un ordinary.
  •unworkable (adjective)
  • un workable,
  • un-workable.
  •wild (adjective)
  • most selfwilled,
  • un-governable,
  • un-fettered,
  • most self-willed,
  • un-manageable,
  • selfwilled,
  • more self-willed,
  • un-bridled,
  • un manageable,
  • most self willed,
  • un bridled,
  • more self willed,
  • un fettered,
  • un controlled,
  • more selfwilled,
  • un disciplined,
  • self willed,
  • un-controlled.

• n.

  •
  • over-the-top,
  • childish,
  • not in your right mind/not right in the head.
  •
  • balmy,
  • ability,
  • tomfool,
  • zany,
  • knowledge,
  • unearthly.
  •
  • shocking,
  • usual.

• Other synonyms:

  •
  • jerky,
  • softheaded.
  •
  • extreme,
  • much.
  •
  • obscene.
  •Other relevant words:
  • goosey,
  • overgrown,
  • pointless,
  • aberrant,
  • amusing,
  • romantic,
  • fantasque,
  • optimistic,
  • Highflying,
  • buffoonish,
  • prodigious,
  • doggerel,
  • fishy,
  • peculiar,
  • simpleminded,
  • immoderate,
  • purposeless,
  • queer,
  • disgraceful,
  • enormous,
  • would-be,
  • undue,
  • scandalous,
  • open to doubt,
  • mythic,
  • ineffective,
  • fantastical,
  • puckish,
  • closed-out,
  • nitwit,
  • unscientific,
  • quixotic,
  • nonsense,
  • crocked,
  • unbecoming,
  • inflated,
  • stilted,
  • fruitless,
  • askew,
  • gross,
  • unearned,
  • dimwit,
  • jocose,
  • Hyperbolical,
  • oxymoronic,
  • pixyish,
  • blockhead,
  • rococo,
  • inconceivable,
  • airheaded,
  • singular,
  • lunkheaded,
  • fault,
  • hopeless,
  • increase,
  • erroneous,
  • high-flown,
  • starry-eyed,
  • swinging,
  • mind-boggling,
  • unentitled,
  • shameful,
  • dreamy,
  • jocular,
  • dopy,
  • unsubstantial,
  • macaronic,
  • extortionate,
  • unique,
  • dubitable,
  • overblown,
  • overwrought,
  • fancy-woven,
  • spiraling,
  • problematic,
  • mistaken,
  • thin,
  • featherheaded,
  • chimeric,
  • irresponsible,
  • inflationary,
  • hollow,
  • mirthful,
  • invalidity,
  • unrealistic,
  • unseemly,
  • inept,
  • reckless,
  • out of the question,
  • astonishing,
  • Doubtable,
  • bombastic,
  • strained,
  • monstrous,
  • unimpressive,
  • unconvincing,
  • impracticable,
  • outre,
  • punning,
  • booby,
  • ungodly,
  • ineffectual,
  • unreal,
  • gothic,
  • burlesque,
  • tang dynasty,
  • barred,
  • offbeat,
  • futile,
  • questionable,
  • unimaginable,
  • fey,
  • absurdness,
  • fancy,
  • dolt,
  • Pathetical,
  • featherbrained,
  • soused,
  • gouge,
  • uncommon,
  • improbable,
  • quibbling,
  • pathetic,
  • cutthroat,
  • stretched,
  • wet,
  • false,
  • goosy,
  • taking the cake,
  • Blague,
  • delusion,
  • unperceiving,
  • crotchety,
  • vacant,
  • prohibited,
  • loaded,
  • ill-judged,
  • exacting,
  • uncalled-for,
  • dreamlike,
  • erratic,
  • Misbecoming,
  • cock-eyed,
  • Unowed,
  • not on,
  • doubtful,
  • absurdity,
  • unacceptable,
  • miss,
  • steep,
  • unproductive,
  • bootless,
  • baloney,
  • pinheaded,
  • undiscerning,
  • rigmarole,
  • witty,
  • far-out,
  • chimerical,
  • humorous,
  • lapse,
  • insupportable,
  • bubbleheaded,
  • problematical,
  • unworthy,
  • too much,
  • absolutely not,
  • strange,
  • Fatuitous,
  • visionary,
  • unheard-of,
  • birthday,
  • mistake,
  • quaint,
  • rash,
  • unmerited,
  • gooselike,
  • hard to believe,
  • comic,
  • hilarious,
  • unsatisfactory,
  • empty,
  • misguided,
  • error,
  • overdone,
  • vain,
  • giddy,
  • Unmeet,
  • florid,
  • intemperate,
  • oversight,
  • waggish,
  • Excluded,
  • beyond belief,
  • immense,
  • vast,
  • stupendous,
  • question,
  • usurious,
  • worthless,
  • dissipated,
  • extraordinary,
  • anomalous,
  • unlikely,
  • whimsical,
  • unjustifiable,
  • screwball,
  • undeserving,
  • sloshed,
  • short-sighted,
  • hare-brained,
  • deviation,
  • uncontained,
  • warped,
  • excessive,
  • pie-eyed,
  • Unpractical,
  • slapstick,
  • idealistic,
  • anserine,
  • Unreasoned,
  • maggoty,
  • Gouging,
  • aimless,
  • side-splitting,
  • intolerable,
  • unfit,
  • unthinking,
  • flimflam,
  • desperate,
  • suspect,
  • abnormal,
  • idiot,
  • fallaciousness,
  • blind,
  • Absurdities,
  • useless,
  • fictitious,
  • disproportionate,
  • suspicious,
  • unjustified,
  • marvelous,
  • skyrocketing,
  • undeserved,
  • flagrant,
  • beyond consideration,
  • unrestrained,
  • falsehood,
  • blunder,
  • forced,
  • Crack-brained,
  • unmatched,
  • thoughtless,
  • playful,
  • lightheaded,
  • myopic,
  • odd,
  • baroque,
  • fabulous,
  • foolhardy,
  • pitiable,
  • impractical,
  • Seemless,
  • bosh,
  • unperceptive,
  • grandiloquent,
  • dunce.

Paraphrases for Preposterous:

• Equivalence

  • Adjective
    ludicrous, nonsensical, absurd, nonsense.
  • Interjection
    absurd, nonsense.

• Independent

  • Adjective
    stupid, idiotic, insane, illogical, derisory, exorbitant, pathetic, aberrant, disgraceful, unbearable, disproportionate.

• Other Related

  • Adjective
    unreasonable, pointless, farcical, laughable, ridiculous, outrageous, senseless, irrational, perverse, incongruous, foolish, fallacious, silly, meaningless, bizarre, wrong-headed, surreal, crazy, grotesque, excessive.
  • Interjection
    ridiculous, outrageous, grotesque.

Antonyms for Preposterous:

• adj.

  • ridiculous, bizarre
    intelligent, possible, smart, serious, plausible, plain, sound, believable, tenable, logical, good, wise, poor, responsible, practical, bad, rational, reasonable, balanced, credible.
  • Other antonyms:
    undeniable, earnest, demonstrated, established, substantial, consistent, sagacious, prudent, sane, realistic, true, indisputable, infallible, sapient, certain, indubitable, demonstrable, judicious, unquestionable, sage, incontrovertible, valid, incontestable, conceivable, well-advised, sensible.