metropolis vs Casablanca

metropolis and Casablanca both are nouns.

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

metropolis (noun)	Casablanca (noun)
people living in a large densely populated municipality	a port on the Atlantic and the largest city of Morocco
a large and densely populated urban area; may include several independent administrative districts