vacuum chamber vs chamber

vacuum chamber and chamber both are nouns.

Word	Noun	Adjective	Verb	Adverb
vacuum chamber	Yes	No	No	No
chamber	Yes	No	Yes	No

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

vacuum chamber: a chamber from which nearly all matter (especially air) has been removed
chamber: a natural or artificial enclosed space

vacuum chamber (noun)	chamber (noun)
a chamber from which nearly all matter (especially air) has been removed	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

vacuum chamber (verb)	chamber (verb)
	place in a chamber