Hammerhead

A hammerhead shark killed Tom.

The hammerhead is a type of shark.

The great hammerhead is a type of shark.

Holonym: hammer

Meronym: hammer face

[The butler] joined us with a telegram for Bobbie on a salver. From her mother, I presumed, calling me some name which she had forgotten to insert in previous communications. Or, of course, possibly expressing once more her conviction that I was a guffin, which, I thought, having had time to ponder over it, would be something in the nature of a bohunkus or a hammerhead.