L'Aquila vs metropolis

L'Aquila and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
L'Aquila	Yes	No	No	No
metropolis	Yes	No	No	No

L'Aquila (noun)	metropolis (noun)
the provincial capital of the Abruzzi region in central Italy	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts