master bedroom vs sleeping room

master bedroom and sleeping room both are nouns.

Word	Noun	Adjective	Verb	Adverb
master bedroom	Yes	No	No	No
sleeping room	Yes	No	No	No

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

master bedroom: the principal bedroom in a house; usually occupied by the head of the household
sleeping room: a room used primarily for sleeping

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

master bedroom (noun)	sleeping room (noun)
the principal bedroom in a house; usually occupied by the head of the household	a room used primarily for sleeping