1. (

• dunce ,
• dunderhead ,
• numskull ,
• blockhead ,
• bonehead ,
• lunkhead ,
• hammerhead ,
• knucklehead ,
• loggerhead ,
• muttonhead ,
• shithead ,
• dumbass ,
• fuckhead

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

2. (

• loggerhead ,
• loggerhead_turtle ,
• Caretta_caretta

) very large carnivorous sea turtle; wide-ranging in warm open seas ;