Deep South vs Miss.

Deep South and Miss. both are nouns.

Word	Noun	Adjective	Verb	Adverb
Deep South	Yes	No	No	No
Miss.	Yes	No	No	No

Deep South (noun)	Miss. (noun)
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 state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War