Sao Goncalo vs city

Sao Goncalo and city both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sao Goncalo	Yes	No	No	No
city	Yes	No	No	No

Sao Goncalo (noun)	city (noun)
an industrial city in southeastern Brazil across the bay from Rio de Janeiro	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts
	an incorporated administrative district established by state charter