urban center vs Chihuahua City

urban center and Chihuahua City both are nouns.

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

urban center (noun)	Chihuahua City (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in northern Mexico in the state of Chihuahua; commercial center of northern Mexico