urban center vs Santa Maria de Belem

urban center and Santa Maria de Belem both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Santa Maria de Belem	Yes	No	No	No

urban center (noun)	Santa Maria de Belem (noun)
a large and densely populated urban area; may include several independent administrative districts	port city in northern Brazil in the Amazon delta; main port and commercial center for the Amazon River basin