city vs Casablanca

city and Casablanca both are nouns.

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

city (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
an incorporated administrative district established by state charter