Burlington vs metropolis

Burlington and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Burlington	Yes	No	No	No
metropolis	Yes	No	No	No

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