dwell vs room

dwell is not a noun while room is a noun.

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

As verbs, room is a hyponym of dwell; that is, room is a word with a more specific, narrower meaning than dwell:

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

dwell (verb)	room (verb)
think moodily or anxiously about something	live and take one's meals at or in
come back to
be an inhabitant of or reside in
originate (in)
exist or be situated within