movie theatre vs theater

movie theatre and theater both are nouns.

Word	Noun	Adjective	Verb	Adverb
movie theatre	Yes	No	No	No
theater	Yes	No	No	No

As nouns, theater is a hypernym of movie theatre; that is, theater is a word with a broader meaning than movie theatre:

movie theatre: a theater where films are shown
theater: a building where theatrical performances or motion-picture shows can be presented

Other hypernyms of movie theatre include house, theatre.

movie theatre (noun)	theater (noun)
a theater where films are shown	a building where theatrical performances or motion-picture shows can be presented
	the art of writing and producing plays
	a region in which active military operations are in progress