Sao Goncalo vs urban center

Sao Goncalo and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sao Goncalo	Yes	No	No	No
urban center	Yes	No	No	No

Sao Goncalo (noun)	urban center (noun)
an industrial city in southeastern Brazil across the bay from Rio de Janeiro	a large and densely populated urban area; may include several independent administrative districts