Novgorod vs urban center

Novgorod and urban center both are nouns.

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

Novgorod (noun)	urban center (noun)
a city in northwestern Russia on the Volkhov River; Russia's oldest city and an important trading center in the Middle Ages	a large and densely populated urban area; may include several independent administrative districts