hotel room vs bedchamber

hotel room and bedchamber both are nouns.

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

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

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

hotel room (noun)	bedchamber (noun)
a bedroom (usually with bath) in a hotel	a room used primarily for sleeping