Pompeii vs metropolis

Pompeii and metropolis both are nouns.

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

Pompeii (noun)	metropolis (noun)
ancient city to the southeast of Naples that was buried by a volcanic eruption from Vesuvius	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts