den vs hideaway

den and hideaway both are nouns.

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

As nouns, den and hideaway are synonyms defined as:

den and hideaway: a hiding place; usually a remote place used by outlaws

Other synonyms of den include hideout.

den (noun)	hideaway (noun)
a room that is comfortable and secluded	an area where you can be alone
a unit of 8 to 10 cub scouts	a hiding place; usually a remote place used by outlaws
the habitation of wild animals
a hiding place; usually a remote place used by outlaws