metropolis vs Essen

metropolis and Essen both are nouns.

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

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