metropolis vs Trento

metropolis and Trento both are nouns.

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

metropolis (noun)	Trento (noun)
people living in a large densely populated municipality	a city in northern Italy (northwest of Venice) on the River Adige; the site of the Council of Trent
a large and densely populated urban area; may include several independent administrative districts