Wuhan vs urban center

Wuhan and urban center both are nouns.

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

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