dorm room vs bedroom

dorm room and bedroom both are nouns.

Word	Noun	Adjective	Verb	Adverb
dorm room	Yes	No	No	No
bedroom	Yes	No	No	No

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

Other hypernyms of dorm room include bedchamber, chamber, sleeping accommodation, sleeping room.

dorm room (noun)	bedroom (noun)
a large sleeping room containing several beds	a room used primarily for sleeping