master bedroom vs bedroom

master bedroom and bedroom both are nouns.

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

As nouns, bedroom is a hypernym of master bedroom; that is, bedroom 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
bedroom: a room used primarily for sleeping

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

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