Synonyms of preposterous

preposterous

adjective

1

as in absurd

conceived or made without regard for reason or reality

the idea that extraterrestrials built the pyramids is preposterous

Synonyms & Similar Words

• absurd
• bizarre
• foolish
• unreal
• insane
• fantastical
• crazy
• fanciful
• strange
• ridiculous
• nonsensical
• fantastic
• incredible
• grotesque
• wild
• curious
• implausible
• off the wall
• peculiar
• inconceivable
• odd
• funny
• weird
• unbelievable
• unthinkable
• ludicrous
• unimaginable
• outlandish
• eccentric
• extravagant
• laughable
• farcical
• surreal
• quaint
• quirky
• wacky
• whacky
• outré
• screwy
• kinky
• queer
• nightmarish
• out-of-the-way
• Alice-in-Wonderland
• way-out
• far-out
• dreamlike
• kooky
• kookie
• bizarro
• queerish
• Kafkaesque

Antonyms & Near Antonyms

• reasonable
• realistic

2

as in silly

showing or marked by a lack of good sense or judgment

a preposterous suggestion to go swimming in this freezing weather

Synonyms & Similar Words

• absurd
• silly
• foolish
• stupid
• crazy
• mad
• insane
• idiotic
• ridiculous
• irrational
• lunatic
• asinine
• fatuous
• nonsensical
• simple
• looney
• zany
• dumb
• harebrained
• whacky
• unreasonable
• unwise
• fool
• daft
• loony
• wacky
• nutty
• idiotical
• daffy
• kooky
• simpleminded
• screwball
• weak
• senseless
• witless
• brainless
• dippy
• inept
• crackpot
• cockeyed
• sappy
• cuckoo
• out to lunch
• dotty
• jerky
• weak-minded
• slow
• unreasoning
• half-baked
• moronic
• ludicrous
• illogical
• balmy
• bubbleheaded
• kookie
• half-witted
• lunkheaded
• imbecilic
• laughable
• thoughtless
• featherheaded
• fallacious
• vacuous
• tomfool
• farcical
• dense
• obtuse
• doltish
• imbecile
• unintelligent
• clueless
• dopey
• lamebrain
• lamebrained
• unreasoned
• dim
• dunderheaded
• mindless
• dull
• opaque
• feebleminded
• invalid
• brain-dead
• pinheaded
• dopy
• unsound
• thick
• softheaded
• dorky
• thickheaded
• oafish
• surd
• nonrational
• soft
• clownish
• dim-witted
• empty-headed
• notional
• gormless
• knuckleheaded
• airheaded
• ill-advised
• chuckleheaded
• slow-witted
• birdbrained
• buffoonish
• boobish
• unconsidered
• chowderheaded

Antonyms & Near Antonyms

• sound
• sensible
• wise
• prudent
• reasonable
• sane
• judicious
• clever
• intelligent
• logical
• valid
• rational
• smart
• sagacious
• bright
• sage
• sapient
• brainy
• well-advised

3

as in ridiculous

so foolish or pointless as to be worthy of scornful laughter

the movie thriller had such a preposterous plot that we were on the edge of our seats snickering

Synonyms & Similar Words

• ridiculous
• absurd
• silly
• pathetic
• foolish
• comical
• ludicrous
• stupid
• unreasonable
• laughable
• fantastical
• farcical
• cockamamie
• irrational
• incredible
• risible
• derisive
• dumb
• insane
• derisory
• crazy
• cockamamy
• for the birds
• fantastic
• idiotic
• asinine
• inane
• nonsensical
• fatuous
• imbecilic
• mad
• moronic
• inconceivable
• harebrained
• unwise
• unreal
• imbecile
• unbelievable
• unrealistic
• illogical
• simpleminded
• lunatic
• witless
• brainless
• loony
• nutty
• wacky
• jerky
• whacky
• daffy
• far-fetched
• kooky
• half-baked
• cuckoo
• senseless
• idiotical
• daft
• cockeyed
• looney
• screwball
• half-witted
• weak-minded
• kookie
• dotty
• balmy

Antonyms & Near Antonyms

• serious
• earnest
• solemn
• reasonable
• logical
• realistic
• conceivable
• rational
• credible
• sensible
• believable