war zone vs military

war zone and military both are nouns.

Word	Noun	Adjective	Verb	Adverb
war zone	Yes	No	No	No
military	Yes	Yes	No	No

war zone (noun)	military (noun)
a combat zone where military operations are coordinated (especially a designated area in international waters where the rights of neutrals are not respected by nations at war)	the military forces of a nation

war zone (adjective)	military (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