What two words are used for the den?

This question is a bit tricky! It depends on what kind of "den" you're talking about.

Here are some possibilities:

* For a lion's den: You could use "lair" or "cave".

* For a cozy living room: You might use "snug" or "retreat".

* For a secret hideout: You could use "hideout" or "fort".

Can you tell me more about the kind of den you're thinking of? That will help me give you the most accurate answer.