workroom vs room

workroom and room both are nouns.

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

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

workroom (noun)	room (noun)
room where work is done	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

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