Deep South vs South Carolina

Deep South and South Carolina both are nouns.

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

Deep South (noun)	South Carolina (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; one of the original 13 colonies
	one of the British colonies that formed the United States, with capital Charles Towne