Mississippi vs Deep South

Mississippi and Deep South both are nouns.

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

Mississippi (noun)	Deep South (noun)
a state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War	the southeastern region of the United States: South Carolina and Georgia and Alabama and Mississippi and Louisiana; prior to the American Civil War all these states produced cotton and permitted slavery
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