metropolis vs Ferrara

metropolis and Ferrara both are nouns.

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

metropolis (noun)	Ferrara (noun)
people living in a large densely populated municipality	a city in northern Italy
a large and densely populated urban area; may include several independent administrative districts