Puebla City vs urban center

Puebla City and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Puebla City	Yes	No	No	No
urban center	Yes	No	No	No

Puebla City (noun)	urban center (noun)
a city in south central Mexico (southeast of Mexico City) on the edge of central Mexican plateau	a large and densely populated urban area; may include several independent administrative districts