Synonyms of dumdums

1 Syllable
goon, chump, boob, dope, fool, dork, sap
2 Syllables
blockhead, dodo, meathead, dimwit, lunkhead, dumbbell, airhead, dunce, stupid, idiot, yo-yo, dumdum, nitwit
3 Syllables
simpleton, lamebrain, clodpate
4 Syllables
ignoramus