metropolis vs Novosibirsk

metropolis and Novosibirsk both are nouns.

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

metropolis (noun)	Novosibirsk (noun)
people living in a large densely populated municipality	a city in the Asian part of Russia on the Ob river; largest city in Siberia
a large and densely populated urban area; may include several independent administrative districts