Katowice vs metropolis

Katowice and metropolis both are nouns.

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

Katowice (noun)	metropolis (noun)
an industrial city of southern Poland	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts