Essen vs metropolis

Essen and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Essen	Yes	No	No	No
metropolis	Yes	No	No	No

Essen (noun)	metropolis (noun)
a city in western Germany; industrial center of the Ruhr	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts