noun (n)

• a stupid person; these words are used to express a low opinion of someone's intelligence(noun.person)

  Synonym:
  blockhead, bonehead, dumbass, dunce, dunderhead, fuckhead, hammerhead, knucklehead, lunkhead, muttonhead, numskull, shithead
  

  source: wordnet30
• very large carnivorous sea turtle; wide-ranging in warm open seas(noun.animal)

  Synonym:
  caretta caretta, loggerhead turtle
  

  source: wordnet30
• A blockhead; a dunce; a numskull.(noun)

  source: webster1913