dormitory room vs bedchamber

dormitory room and bedchamber both are nouns.

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

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

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

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