urban center vs Santiago de los Caballeros

urban center and Santiago de los Caballeros both are nouns.

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

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