urban center vs Abilene

urban center and Abilene both are nouns.

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

urban center (noun)	Abilene (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in central Texas
	a town in central Kansas to the west of Topeka; home of Dwight D. Eisenhower