city vs Pompeii

city and Pompeii both are nouns.

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

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