dormitory room vs sleeping room

dormitory room and sleeping room both are nouns.

Word	Noun	Adjective	Verb	Adverb
dormitory room	Yes	No	No	No
sleeping room	Yes	No	No	No

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

Other hypernyms of dormitory room include bedchamber, bedroom, chamber, sleeping accommodation.

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