Belem vs urban center

Belem and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Belem	Yes	No	No	No
urban center	Yes	No	No	No

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