metropolis vs Zurich

metropolis and Zurich both are nouns.

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

metropolis (noun)	Zurich (noun)
people living in a large densely populated municipality	the largest city in Switzerland; located in the northern part of the country
a large and densely populated urban area; may include several independent administrative districts