Kazan vs metropolis

Kazan and metropolis both are nouns.

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

Kazan (noun)	metropolis (noun)
an industrial city in the European part of Russia, it is the capital and largest city of the Republic of Tatarstan, Russia	people living in a large densely populated municipality
United States stage and screen director (born in Turkey) and believer in method acting (1909-2003)	a large and densely populated urban area; may include several independent administrative districts