Casper vs urban center

Casper and urban center both are nouns.

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

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