hotel room vs chamber

hotel room and chamber both are nouns.

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

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

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

hotel room (noun)	chamber (noun)
a bedroom (usually with bath) in a hotel	a natural or artificial enclosed space
	a room used primarily for sleeping
	a room where a judge transacts business
	an enclosed volume in the body
	a deliberative or legislative or administrative or judicial assembly

hotel room (verb)	chamber (verb)
	place in a chamber