Kimberley vs urban center

Kimberley and urban center both are nouns.

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

Kimberley (noun)	urban center (noun)
city in central South Africa; center for diamond mining and diamond marketing	a large and densely populated urban area; may include several independent administrative districts