Linz vs metropolis

Linz and metropolis both are nouns.

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

Linz (noun)	metropolis (noun)
city in northern Austria on the Danube; noted as a cultural center	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts