Santiago de los Caballeros vs urban center

Santiago de los Caballeros and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Santiago de los Caballeros	Yes	No	No	No
urban center	Yes	No	No	No

Santiago de los Caballeros (noun)	urban center (noun)
city in the northern Dominican Republic	a large and densely populated urban area; may include several independent administrative districts