combat zone vs military

combat zone and military both are nouns.

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

combat zone (noun)	military (noun)
a military area where combat forces operate	the military forces of a nation
a city district known for its vice and high crime rate

combat 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