urban center vs Casper

urban center and Casper both are nouns.

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

urban center (noun)	Casper (noun)
a large and densely populated urban area; may include several independent administrative districts	a city of east central Wyoming on the North Platte river