peacekeeping vs military

peacekeeping and military both are nouns.

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

peacekeeping (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 (adjective)	military (adjective)
of or relating to the preservation of peace between hostile groups by international military forces	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