Thirty Years' War vs war

Thirty Years' War and war both are nouns.

Word	Noun	Adjective	Verb	Adverb
Thirty Years' War	Yes	No	No	No
war	Yes	No	Yes	No

Thirty Years' War (noun)	war (noun)
a series of conflicts (1618-1648) between Protestants and Catholics starting in Germany and spreading until France and Denmark and Sweden were opposing the Holy Roman Empire and Spain	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

Thirty Years' War (verb)	war (verb)
	make or wage war