Dusseldorf vs metropolis

Dusseldorf and metropolis both are nouns.

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

Dusseldorf (noun)	metropolis (noun)
an industrial city in western Germany on the Rhine	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts