Brunswick vs urban center

Brunswick and urban center both are nouns.

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

Brunswick (noun)	urban center (noun)
a city in central Germany	a large and densely populated urban area; may include several independent administrative districts
a university town in southwestern Maine
a town in southeast Georgia near the Atlantic coast; a port of entry