war machine vs peacekeeping

war machine and peacekeeping both are nouns.

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

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

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