make peace vs war

make peace is not a noun while war is a noun.

Word	Noun	Adjective	Verb	Adverb
make peace	No	No	Yes	No
war	Yes	No	Yes	No

make peace (noun)	war (noun)
	the waging of armed conflict against an enemy
	a concerted campaign to end something that is injurious
	an active struggle between competing entities
	a legal state created by a declaration of war and ended by official declaration during which the international rules of war apply

make peace (verb)	war (verb)
end hostilities	make or wage war