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Definition/Meaning

(adjective)

crazy or silly, foolish;

e.g. She was particularly loony when messing around with her friends.

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Opposite Words

A posteriori

Alert

Analytic

Balanced

Businesslike

Clear

Cognitive

Coherent

Consequent

Earnest

Earnestly

Exceptional

Good

Grave

Healthy

Humorless

Hyperintelligent

Lucid

Nimble

No-nonsense

Normal

Perspicacious

Po-faced

Professional

Right

Sane

Sedate

Serious

Severe

Sober

Sobersided

Solemn

Stable

Unsmiling

Valid

Validity

Weighty

Well-adjusted

Well-advised

Well-founded

Well-grounded

Witted

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Related Words

Abnormal

Absurd

Airhead

Birdbrain

Blockhead

Bonehead

Brain-dead

Brainless

Bubblehead

Character

Chowderhead

Chucklehead

Clot

Cluck

Clueless

Clunk

Cockamamie

Codger

Comical

Crack

Crackpot

Crank

Cretin

Cuddy

Deadhead

Dense

Derisory

Deviant

Dim

Dim-witted

Dimwit

Dip

Dodo

Dolt

Donkey

Doofus

Dope

Dopey

Dork

Dorky

Dull

Dullard

Dumb

Dumbbell

Dumbhead

Dumdum

Dummy

Dunce

Dunderhead

Eccentric

Empty

Empty-headed

Fantastic

Farcical

Fathead

Fatuous

Fey

Flake

Gander

Golem

Goof

Goon

Gormless

Half-wit

Hammerhead

Hardhead

Idiot

Ignoramus

Imbecile

Inane

Jackass

Know-nothing

Knucklehead

Kook

Lamebrain

Laughable

Loggerhead

Loon

Loopy

Lout

Ludicrous

Lump

Lunkhead

Madman

Madwoman

Manic-depressive

Meaningless

Meathead

Mindless

Moron

Mutt

Natural

Neanderthal

Neurotic

Nimrod

Nincompoop

Ninny

Nit

Nitwit

Noddy

Noodle

Numbskull

Numskull

Oaf

Obsessive

Obtuse

Oddball

Oddity

Off

Opaque

Original

Pathetic

Pinhead

Pinheaded

Pointless

Prat

Preposterous

Psychotic

Quiz

Ratbag

Ridiculous

Risible

Saphead

Schizo

Schizoid

Schlub

Schnook

Screwball

Senseless

Shlub

Silly

Simple

Simpleton

Slow

Slow-witted

Sociopath

Soft

Softheaded

Stock

Stupe

Stupid

Thick

Thick-witted

Thickhead

Thickheaded

Turkey

Unintelligent

Unsmart

Vacuous

Weak-minded

Witless

Witted

Yahoo

Yo-yo

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