urban center vs St. Mary of Bethlehem

urban center and St. Mary of Bethlehem both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
St. Mary of Bethlehem	Yes	No	No	No

urban center (noun)	St. Mary of Bethlehem (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