Thesaurus

admiring, adoring, affectionate, affectioned, aflutter, agitated, agog, amative, amatory, amok, amorous, amuck, antic, ardent, around the bend, aroused, attached, avid, balmy, barmy, bats, batty, berserk, bonkers, brainsick, buggy, captivated, caressing, caressive, caring, certifiable, certified, charmed, committed, crackbrained, cracked, crackers, crazed, crazy, curious, daft, demented, demoniac, demoniacal, deranged, distracted, disturbed, doting, dotty, drunk, eager, eerie, eery, enamored, enthusiastic, evangelical, evangelistic, excited, exotic, fantastic, fantastical, fatherly, fevered, fey, fond, freaky, fruity, funny, gaga, glowing, gothic, great, grotesque, gung ho, half-baked, half-crazed, haywire, hebephrenic, idiotic, idolatrous, impossible, impractical, in love, infatuated, insane, intoxicated, irrational, kookie, kooky, loco, loony, loopy, lovable, loveable, loverlike, loverly, lovesome, loving, lunatic, mad, maniac, maniacal, manic-depressive, maniclike, mentally ill, meshuga, meshugga, meshugge, meshuggeneh, meshuggener, moonstruck, nervous, non compos mentis, nuts, nutty, odd, oddish, of unsound mind, other, overenthusiastic, overexcited, overfond, paranoid, passionate, peculiar, possessed, psychopathic, psychopathologic, psychopathological, psychotic, quaint, queer, quixotic, raving, raving mad, romantic, round the bend, rum, rummy, schizophrenic, screw-loose, screwball, screwy, sick, singular, smitten, soft on, softheaded, spirited, stimulated, stirred, stirred up, strange, taken with, teased, tender, tenderhearted, thrilled, thrillful, titillated, touched, touchy-feely, unbalanced, unfunctional, unhinged, unrealistic, unreasonable, unsound, unstable, unusual, unwieldy, uxorious, wacky, warm, warmhearted, weird, whacky, wild, wild-eyed, zealous

crazy is a ADJ.

crazy, looney, loony, weirdo

crazy is a NOUN.