peacekeeper vs war machine

peacekeeper and war machine both are nouns.

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

peacekeeper (noun)	war machine (noun)
the pistol of a law officer in the old West	the military forces of a nation
someone who keeps peace
a member of a military force that is assigned (often with international sanction) to preserve peace in a trouble area