metropolis vs Wroclaw

metropolis and Wroclaw both are nouns.

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

metropolis (noun)	Wroclaw (noun)
people living in a large densely populated municipality	a city in southwestern Poland on the Oder
a large and densely populated urban area; may include several independent administrative districts