Shenandoah National Park vs Old Dominion State

Shenandoah National Park and Old Dominion State both are nouns.

Word	Noun	Adjective	Verb	Adverb
Shenandoah National Park	Yes	No	No	No
Old Dominion State	Yes	No	No	No

Shenandoah National Park (noun)	Old Dominion State (noun)
a national park in Virginia for the Blue Ridge Mountains	a state in the eastern United States; one of the original 13 colonies; one of the Confederate States in the American Civil War