Santa Maria de Belem vs urban center

Santa Maria de Belem and urban center both are nouns.

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

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