urban center vs Kisumu

urban center and Kisumu both are nouns.

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

urban center (noun)	Kisumu (noun)
a large and densely populated urban area; may include several independent administrative districts	a port city in western Kenya on the northeastern shore of Lake Victoria; fishing and trading center