Chongqing vs urban center

Chongqing and urban center both are nouns.

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

Chongqing (noun)	urban center (noun)
a city in south-central China on the Chang Jiang; a commercial center for western China	a large and densely populated urban area; may include several independent administrative districts