Murmansk vs urban center

Murmansk and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Murmansk	Yes	No	No	No
urban center	Yes	No	No	No

Murmansk (noun)	urban center (noun)
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