Graz vs metropolis

Graz and metropolis both are nouns.

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

Graz (noun)	metropolis (noun)
an industrial city is southeastern Austria	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts