Burlington vs urban center

Burlington and urban center both are nouns.

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

Burlington (noun)	urban center (noun)
the largest city in Vermont; located in northwestern Vermont on Lake Champlain; site of the University of Vermont	a large and densely populated urban area; may include several independent administrative districts