urban center vs Chihuahua

urban center and Chihuahua both are nouns.

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

urban center (noun)	Chihuahua (noun)
a large and densely populated urban area; may include several independent administrative districts	an old breed of tiny short-haired dog with protruding eyes from Mexico held to antedate Aztec civilization
	the largest state in Mexico; mostly high plateau
	a city in northern Mexico in the state of Chihuahua; commercial center of northern Mexico