dormitory vs sleeping room

dormitory and sleeping room both are nouns.

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

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

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

dormitory (noun)	sleeping room (noun)
a college or university building containing living quarters for students	a room used primarily for sleeping
a large sleeping room containing several beds