Montreal vs metropolis

Montreal and metropolis both are nouns.

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

Montreal (noun)	metropolis (noun)
a city in southern Quebec province on the Saint Lawrence River; the largest city in Quebec and 2nd largest in Canada; the 2nd largest French-speaking city in the world	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts