urban center vs Nanchang

urban center and Nanchang both are nouns.

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

urban center (noun)	Nanchang (noun)
a large and densely populated urban area; may include several independent administrative districts	a walled city in southeastern China on the Gan Jiang