urban center vs Orizaba

urban center and Orizaba both are nouns.

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

urban center (noun)	Orizaba (noun)
a large and densely populated urban area; may include several independent administrative districts	a city of east central Mexico (west of Veracruz); a popular resort