airhead, blockhead, chucklehead, dimwit, dodo, dolt, donkey, dope, dork [slang], dullard, dumbbell, dummy, dunce, fathead, goof, goon, half-wit, idiot, ignoramus, imbecile, knucklehead, lamebrain, loon, lunkhead, moron, nincompoop, ninny, nitwit, noddy, noodle, numskull (or numbskull), oaf, pinhead, saphead, simpleton, stock, turkey, yahoo, yo-yo;
KNOW-NOTHING Defined for English Language Learners
Definition of know-nothing for English Language Learners
: a person who lacks intelligence or knowledge : a stupid or ignorant person
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Thesaurus: All synonyms and antonyms for know-nothing
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