metropolis vs Nijmegen

metropolis and Nijmegen both are nouns.

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

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