Assouan vs metropolis

Assouan and metropolis both are nouns.

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

Assouan (noun)	metropolis (noun)
an ancient city on the Nile in Egypt; two dams across the Nile have been built nearby	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts