urban center vs Torreon

urban center and Torreon both are nouns.

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

urban center (noun)	Torreon (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in northern Mexico to the west of Monterrey