armed combat vs war

armed combat and war both are nouns.

Word	Noun	Adjective	Verb	Adverb
armed combat	Yes	No	No	No
war	Yes	No	Yes	No

armed combat (noun)	war (noun)
an engagement fought between two military forces	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

armed combat (verb)	war (verb)
	make or wage war