Greenville vs Mississippi

Greenville and Mississippi both are nouns.

Word	Noun	Adjective	Verb	Adverb
Greenville	Yes	No	No	No
Mississippi	Yes	No	No	No

Greenville (noun)	Mississippi (noun)
a town in northwest South Carolina in the Piedmont	a state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War
a town in western Mississippi on the Mississippi River to the north of Vicksburg	a major North American river and the chief river of the United States; rises in northern Minnesota and flows southward into the Gulf of Mexico
a city in eastern North Carolina; tobacco market