Milwaukee vs urban center

Milwaukee and urban center both are nouns.

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

Milwaukee (noun)	urban center (noun)
largest city of Wisconsin; located in southeastern Wisconsin on the western shore of Lake Michigan; a flourishing agricultural center known for its breweries	a large and densely populated urban area; may include several independent administrative districts