Nijmegen vs metropolis

Nijmegen and metropolis both are nouns.

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

Nijmegen (noun)	metropolis (noun)
an industrial city in the eastern Netherlands	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts