den vs habitation

den and habitation both are nouns.

Word	Noun	Adjective	Verb	Adverb
den	Yes	No	No	No
habitation	Yes	No	No	No

As nouns, habitation is a hypernym of den; that is, habitation is a word with a broader meaning than den:

den (noun)	habitation (noun)
a room that is comfortable and secluded	the act of dwelling in or living permanently in a place (said of both animals and men)
a unit of 8 to 10 cub scouts	housing that someone is living in
the habitation of wild animals	the native habitat or home of an animal or plant
a hiding place; usually a remote place used by outlaws