multiplex vs movie theater

multiplex and movie theater both are nouns.

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

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

multiplex: a movie theater that has several different auditoriums in the same building
movie theater: a theater where films are shown

Other hypernyms of multiplex include cinema, movie house, movie theatre, picture palace.

multiplex (noun)	movie theater (noun)
a movie theater that has several different auditoriums in the same building	a theater where films are shown
communicates two or more signals over a common channel

multiplex (adjective)	movie theater (adjective)
having many parts or aspects
many and varied; having many features or forms