Columbus vs Mississippi

Columbus and Mississippi both are nouns.

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

Columbus (noun)	Mississippi (noun)
the state capital of Ohio; located in the center of the state; site of Ohio State University	a state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War
a city in western Georgia on the Chattahoochee River; industrial center	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 town in eastern Mississippi near the border with Alabama
Italian navigator who discovered the New World in the service of Spain while looking for a route to China (1451-1506)