peacekeeping operation vs military

peacekeeping operation and military both are nouns.

Word	Noun	Adjective	Verb	Adverb
peacekeeping operation	Yes	No	No	No
military	Yes	Yes	No	No

peacekeeping operation (noun)	military (noun)
the activity of keeping the peace by military forces (especially when international military forces enforce a truce between hostile groups or nations)	the military forces of a nation

peacekeeping operation (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