theater vs military machine

theater and military machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
theater	Yes	No	No	No
military machine	Yes	No	No	No

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