metropolis vs Murmansk

metropolis and Murmansk both are nouns.

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

metropolis (noun)	Murmansk (noun)
people living in a large densely populated municipality	a port city in northwestern Russia on the Kola Peninsula; the largest city to the north of the Arctic Circle; an important supply line to Russia in World War I and World War II
a large and densely populated urban area; may include several independent administrative districts