city vs Savannah

city and Savannah both are nouns.

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

city (noun)	Savannah (noun)
people living in a large densely populated municipality	a port in eastern Georgia near the mouth of the Savannah river
a large and densely populated urban area; may include several independent administrative districts	a river in South Carolina that flows southeast to the Atlantic
an incorporated administrative district established by state charter