Synonyms of wacko

wacko 1 of 2

adjective

ˈwa-(ˌ)kō 

variants also whacko

as in absurd

showing or marked by a lack of good sense or judgment

a completely wacko obsession with cleaning

Synonyms & Similar Words

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

Antonyms & Near Antonyms

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

wacko

2 of 2

noun

variants also whacko

as in eccentric

a person of odd or whimsical habits

Some think he is a wacko but I consider him a genius.

Synonyms & Similar Words

• eccentric
• character
• loony
• weirdo
• crackpot
• kook
• nutcase
• nut
• nutter
• loon
• oddball
• original
• screwball
• maverick
• crank
• fruitcake
• piece of work
• freak
• zany
• flake
• codger
• oddity
• rarity
• bohemian
• odd duck
• quiz
• head case
• crack
• crackbrain
• nonconformist
• geezer
• coot
• curio
• quixote
• fantast
• fantastico

Antonyms & Near Antonyms

• sheep
• follower
• conformist
• conformer

Example Sentences

Recent Examples of wacko

Adjective

This wacko crew was one of the greatest things in the history of television. — Jordan Hoffman, EW.com, 14 Aug. 2025

Sounds crazy, but when has UAB football not been completely wacko. — Joseph Goodman | [email protected], al, 16 Dec. 2022

Noun

His search takes him to a wacko cult in the desert run by a scamster, and that of course puts the sheriff in deadly danger. — Sandra Dallas, Denver Post, 6 July 2025

You could also get lost attempting to read the splintered English and Hebrew letters running atop a stage festooned with wacko props and occult imagery. — Andrew Lampert, Artforum, 1 May 2025