Flint River vs Empire State of the South

Flint River and Empire State of the South both are nouns.

Word	Noun	Adjective	Verb	Adverb
Flint River	Yes	No	No	No
Empire State of the South	Yes	No	No	No

Flint River (noun)	Empire State of the South (noun)
a river in western Georgia that flows generally south to join the Chattahoochee River at the Florida border where they form the Apalachicola River	a state in southeastern United States; one of the Confederate states during the American Civil War