urban center vs Wuhan

urban center and Wuhan both are nouns.

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

urban center (noun)	Wuhan (noun)
a large and densely populated urban area; may include several independent administrative districts	a city of central China on the Chang Jiang; the commercial and industrial center of central China