Matamoros vs urban center

Matamoros and urban center both are nouns.

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

Matamoros (noun)	urban center (noun)
a city in northeastern Mexico opposite Brownsville near the mouth of the Rio Grande	a large and densely populated urban area; may include several independent administrative districts