cubbyhole vs room

cubbyhole and room both are nouns.

Word	Noun	Adjective	Verb	Adverb
cubbyhole	Yes	No	No	No
room	Yes	No	Yes	No

As nouns, room is a hypernym of cubbyhole; that is, room is a word with a broader meaning than cubbyhole:

cubbyhole (noun)	room (noun)
a small compartment	an area within a building enclosed by walls and floor and ceiling
a small secluded room	the people who are present in a room
	space for movement
	opportunity for

cubbyhole (verb)	room (verb)
	live and take one's meals at or in