Fort Wayne vs metropolis

Fort Wayne and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fort Wayne	Yes	No	No	No
metropolis	Yes	No	No	No

Fort Wayne (noun)	metropolis (noun)
a city in northeastern Indiana	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts