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
• irrational
• stupid
• insane
• fool
• nutty
• kooky
• dumb
• crackpot
• ridiculous
• cuckoo
• daffy
• dippy
• nonsensical
• unreasonable
• screwball
• simple
• batty
• fatuous
• preposterous
• harebrained
• unreasoning
• asinine
• simpleminded
• gaga
• daft
• witless
• weak
• dotty
• jerky
• out to lunch
• brainless
• barmy
• loony tunes
• sappy
• cockeyed
• unwise
• lunatic
• senseless
• weak-minded
• inept
• crackbrained
• slow
• meshuga
• bubbleheaded
• moronic
• half-baked
• balmy
• half-witted
• lunkheaded
• tomfool
• unreasoned
• imbecile
• fruity
• clueless
• featherheaded
• dopey
• pinheaded
• thoughtless
• brain-dead
• illogical
• unintelligent
• feebleminded
• dull
• mindless
• dense
• doltish
• lamebrain
• obtuse
• 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
• soft
• gormless
• 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

Plemons is simply next level in this one, a balls-out performance of high wacko dimension that somehow manages to be grounded in humanity, even pathos for this poor thing. — Pete Hammond, Deadline, 28 Aug. 2025

People who see ghosts tend to see the same ghost wafting down the same staircase, but none of the characters populating Leo’s wacko hallucinations have returned for a repeat perfor-mance. — Literary Hub, 10 Apr. 2026

Noun

Out of nowhere, there’s a wacko outdoor puppet theater production by a troupe that operates like a New Age cult. — Charles McNulty, Los Angeles Times, 25 June 2024

This is a wacko package to be sure, and overlong at two-and-three-quarter hours, so mileage will vary even for devoted Lanthimos fans. — David Rooney, The Hollywood Reporter, 17 May 2024