urban center vs Barranquilla

urban center and Barranquilla both are nouns.

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

urban center (noun)	Barranquilla (noun)
a large and densely populated urban area; may include several independent administrative districts	a port city of northern Colombia near the Caribbean on the Magdalena River