Jacksonville vs metropolis

Jacksonville and metropolis both are nouns.

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

Jacksonville (noun)	metropolis (noun)
Florida's largest city; a port and important commercial center in northeastern Florida	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts