L'Aquila vs urban center

L'Aquila and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
L'Aquila	Yes	No	No	No
urban center	Yes	No	No	No

L'Aquila (noun)	urban center (noun)
the provincial capital of the Abruzzi region in central Italy	a large and densely populated urban area; may include several independent administrative districts