metropolis vs Bydgoszcz

metropolis and Bydgoszcz both are nouns.

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

metropolis (noun)	Bydgoszcz (noun)
people living in a large densely populated municipality	an industrial city and river port in northern Poland
a large and densely populated urban area; may include several independent administrative districts