peacekeeping vs military machine

peacekeeping and military machine both are nouns.

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

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