Open English Wordnet
Nouns
(n)dunce, dunderhead, numskull, blockhead, bonehead, lunkhead, hammerhead, knucklehead, loggerhead, muttonhead, shithead, dumbass, fuckheada stupid person; these words are used to express a low opinion of someone's intelligence
(n)loggerhead, loggerhead turtle, Caretta carettavery large carnivorous sea turtle; wide-ranging in warm open seas