1. (adj) crazy, loony, looney, nutcase, weirdo
someone deranged and possibly dangerous
Synonyms: spook, nutcase, creep, weirdo, crazy, weirdie, loony, weirdy, looney
Antonyms: practical, sane, unenthusiastic, familiar, unexcited
2. (adj) brainsick, crazy, demented, disturbed, mad, sick, unbalanced, unhinged
affected with madness or insanity
Synonyms: harebrained, insane, nauseous, wan, disgusted, gaga, sore, imbalanced, macabre, brainsick, pallid, sick of(p), sick, grisly, disquieted, half-baked, maladjusted, unbalanced, unhinged, disturbed, softheaded, gruesome, dotty, unrestrained, grim, sickish, worried, excited, nauseated, sick(p), fed up(p), mad, wild, pale, upset, delirious, demented, screwball, crazy, ghastly, huffy, ill, queasy, distressed, frantic, tired of(p)
Antonyms: unenthusiastic, unexcited, sane, familiar, practical
3. (adj) crazy, half-baked, screwball, softheaded
foolish; totally unsound
Synonyms: mad, unhinged, dotty, sick, demented, screwball, softheaded, crazy, half-baked, brainsick, wild, disturbed, gaga, unbalanced, underdone
Antonyms: practical, sane, unexcited, familiar, unenthusiastic
4. (adj) crazy
possessed by inordinate excitement
Synonyms: mad, unhinged, dotty, sick, demented, screwball, softheaded, half-baked, brainsick, wild, disturbed, gaga, unbalanced
Antonyms: unexcited, sane, unenthusiastic, familiar, practical
5. (adj) crazy
bizarre or fantastic
Synonyms: mad, unhinged, dotty, sick, demented, screwball, softheaded, half-baked, brainsick, wild, disturbed, gaga, unbalanced
Antonyms: unenthusiastic, unexcited, practical, familiar, sane
6. (adj) crazy, wild, dotty, gaga
intensely enthusiastic about or preoccupied with
Synonyms: raging, round the bend, gaga, senile, nutty, buggy, doddering, brainsick, crackers, dotty, untamed, sick, unfounded, doddery, wacky, kooky, daft, bats, hazardous, unbalanced, nuts, unhinged, kookie, fruity, disturbed, softheaded, bonkers, godforsaken, uncivilised, cracked, haywire, uncivilized, half-baked, waste, baseless, risky, angry, idle, mad, wild, barbarian, savage, fantastic, demented, screwball, loopy, violent, crazy, loco, raving mad, batty, loony, barmy, groundless, barbaric, around the bend, furious, balmy, unwarranted, tempestuous, whacky
Antonyms: unexcited, familiar, practical, unenthusiastic, sane
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Synonyms and Antonyms of crazy 
