Given a concept word, generate a hypernym for it. A hypernym is a superordinate, i.e. a word with a broad meaning constituting a category, that generalizes another word. For example, color is a hypernym of red.

Let me give you an example: crystal
The answer to this example can be: rock
Here is why: A crystal is a type of rock, so rock is a valid hypernym output.

OK. solve this:
alligator
Answer:
predator