metropolis vs Palermo

metropolis and Palermo both are nouns.

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

metropolis (noun)	Palermo (noun)
people living in a large densely populated municipality	the capital of Sicily; located in northwestern Sicily; an important port for 3000 years
a large and densely populated urban area; may include several independent administrative districts