Bighorn River vs Equality State

Bighorn River and Equality State both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bighorn River	Yes	No	No	No
Equality State	Yes	No	No	No

Bighorn River (noun)	Equality State (noun)
a river that flows from central Wyoming to the Yellowstone River in southern Montana	a state in the western United States; mountainous in the west and north with the Great Plains in the east