Joao Pessoa vs urban center

Joao Pessoa and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Joao Pessoa	Yes	No	No	No
urban center	Yes	No	No	No

Joao Pessoa (noun)	urban center (noun)
a city in northeastern Brazil near the Atlantic Ocean to the north of Recife	a large and densely populated urban area; may include several independent administrative districts