urban center vs Chungking

urban center and Chungking both are nouns.

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

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