urban center vs Valparaiso

urban center and Valparaiso both are nouns.

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

urban center (noun)	Valparaiso (noun)
a large and densely populated urban area; may include several independent administrative districts	the chief port and second largest city of Chile; located on a wide harbor in central Chile