- dunce, dunderhead, numskull, blockhead, bonehead, lunkhead, hammerhead, knucklehead, loggerhead, muttonhead, shithead, fuckhead - these words are used to express a low opinion of someone's intelligence
--1 is a kind of simpleton, simple
- loggerhead, loggerhead turtle, Caretta caretta - very large carnivorous sea turtle; wide ranging in warm open seas
--2 is a kind of sea turtle, marine turtle
--2 is a member of Caretta, genus Caretta