Concepcion vs urban center

Concepcion and urban center both are nouns.

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

Concepcion (noun)	urban center (noun)
an industrial city in Chile to the south of Santiago	a large and densely populated urban area; may include several independent administrative districts