Bydgoszcz vs metropolis

Bydgoszcz and metropolis both are nouns.

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

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