military vs theater

military and theater both are nouns.

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

military (noun)	theater (noun)
the military forces of a nation	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

military (adjective)	theater (adjective)
associated with or performed by members of the armed services as contrasted with civilians
characteristic of or associated with soldiers or the military
of or relating to the study of the principles of warfare