Chattahoochee River vs Peach State

Chattahoochee River and Peach State both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chattahoochee River	Yes	No	No	No
Peach State	Yes	No	No	No

Chattahoochee River (noun)	Peach State (noun)
a river rising in northern Georgia and flowing southwest and south to join the Flint 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