Rocroi vs Thirty Years' War

Rocroi and Thirty Years' War both are nouns.

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

Rocroi (noun)	Thirty Years' War (noun)
a battle in the Thirty Years' War (1643); the French defeated the Spanish invaders	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