adjective
crazy, mad
Synonyms: absurd, baked, balmy, bananas, bonkers, cracked, crazed, daft, demented, deranged, dippy, flaky, flipped out, foolish, freaked out, fried, idiotic, insane, irrational, kooky, loco, maniac, maniacal, nonsensical, nutty, preposterous, psyched out, psychotic, schizoid, screwy, stupid, unsound, whacko, zany
Antonyms: healthy, sane, sensible
noun
person who is crazy, mad
Synonyms: crackpot, crank, cuckoo, demoniac, flake, fruitcake, kook, lamebrain, loon, maniac, neurotic, nut, paranoid, psycho, psychopath, psychotic, scatterbrain, schizophrenic, sociopathic
Antonyms: sane