urban center vs Parkersburg

urban center and Parkersburg both are nouns.

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

urban center (noun)	Parkersburg (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in northwestern West Virginia on the Ohio river