metropolis vs Graz

metropolis and Graz both are nouns.

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

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