hiding place vs den

hiding place and den both are nouns.

Word	Noun	Adjective	Verb	Adverb
hiding place	Yes	No	No	No
den	Yes	No	No	No

As nouns, den is a hyponym of hiding place; that is, den is a word with a more specific, narrower meaning than hiding place:

Other hyponyms of hiding place include drop, hideaway, hideout, lurking place.

hiding place (noun)	den (noun)
a place suitable for hiding something (such as yourself)	a room that is comfortable and secluded
	a unit of 8 to 10 cub scouts
	the habitation of wild animals
	a hiding place; usually a remote place used by outlaws