Valparaiso vs urban center

Valparaiso and urban center both are nouns.

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

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