Deep South vs Palmetto State

Deep South and Palmetto State both are nouns.

Word	Noun	Adjective	Verb	Adverb
Deep South	Yes	No	No	No
Palmetto State	Yes	No	No	No

Deep South (noun)	Palmetto State (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