Synonyms of witless

1 Syllable

crass, daft, mad, dumb, dull

2 Syllables

wacky, tomfool, kooky, dotty, silly, sillier, duller, dafter, daftest, foolish, fatuous, zany, stupid, loony, doltish, nutty, dullest, crasser, absurd, loopy, nescient, brainless, mindless, dippy, daffy, silliest, crassest, jerky, crazy

3 Syllables

unstudious, stupidest, birdbrained, ignorant, nitwitted, softheaded, unwiser, half-baked, lunatic, senseless, idiotic, unwise, ludicrous, unthinking, moronic, half-witted, thick-headed

4 Syllables

lamebrained, irrational, imbecilic, muddleheaded, ill-advised, imbecile, unscholarly, ridiculous, uninstructed, nonsensical, harebrained, asinine, feebleminded, cockamamy

5 Syllables

unintelligent, unknowledgeable, unreflective, anencephalic, unintellectual, anencephalous