metropolis vs Patavium

metropolis and Patavium both are nouns.

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

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