Thesaurus

Synonyms for Wacky include:

absurd, amok, amuck, around the bend, asinine, balmy, barmy, bats, batty, berserk, bonkers, brainsick, buggy, certifiable, certified, cockamamie, cockamamy, cockeyed, crackbrained, cracked, crackers, crazed, crazy, daft, demented, demoniac, demoniacal, deranged, derisory, distracted, disturbed, dotty, fatuous, fey, fond, foolish, fruity, goofy, half-crazed, harebrained, haywire, hebephrenic, idiotic, ill-advised, ill-conceived, impolitic, imprudent, inadvisable, inane, insane, irrational, kookie, kooky, laughable, loco, loony, loopy, ludicrous, lunatic, mad, maniac, maniacal, manic-depressive, maniclike, mentally ill, mindless, misguided, moonstruck, non compos mentis, nonsensical, nuts, nutty, of unsound mind, paranoid, possessed, preposterous, psychopathic, psychopathologic, psychopathological, psychotic, rattlebrained, rattlepated, raving, raving mad, ridiculous, round the bend, sappy, scatterbrained, scatty, schizophrenic, screw-loose, screwy, sick, silly, touched, unadvisable, unadvised, unbalanced, unhinged, unreasonable, unsound, unstable, unwise, vacuous, wacky, whacky, wild, zany

wacky is a ADJ.