What is a synonym to den?

Here are some synonyms for "den," depending on the context:

General:

* Lair

* Hideaway

* Retreat

* Nest

* Grotto

* Sanctuary

For a room:

* Study

* Office

* Library

* Playroom

* Family room

For an animal:

* Burrow

* Hole

* Cave

* Nest

Figurative:

* Fortress

* Stronghold

* Domain

The best synonym will depend on the specific meaning of "den" in your context.