Synonyms of dimwitted

1 Syllable
dumb
2 Syllables
doltish, simple, dense
3 Syllables
moronic, half-witted, obtuse, thickskulled, blockheaded, thick-skulled, thickheaded
4 Syllables
empty-headed, simpleminded, boneheaded, loggerheaded
5 Syllables
unintelligent