Princeton's WordNet
dunce, dunderhead, numskull, blockhead, bonehead, lunkhead, hammerhead, knucklehead, loggerhead, muttonhead, shithead, dumbass, fuckheadnoun
a stupid person; these words are used to express a low opinion of someone's intelligence
Synonyms:
loggerhead, knucklehead, dunderhead, bonehead, hammerhead, numskull, loggerhead turtle, dunce, shithead, dumbass, blockhead, muttonhead, hammerhead shark, lunkhead
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