Mississippi vs South

Mississippi and South both are nouns.

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

Mississippi (noun)	South (noun)
a state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War	the southern states that seceded from the United States in 1861
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	the region of the United States lying to the south of the Mason-Dixon line