Cracow vs metropolis

Cracow and metropolis both are nouns.

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

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