Potomac vs Old Dominion State

Potomac and Old Dominion State both are nouns.

Word	Noun	Adjective	Verb	Adverb
Potomac	Yes	No	No	No
Old Dominion State	Yes	No	No	No

Potomac (noun)	Old Dominion State (noun)
term sometimes used to refer to Washington, D.C.	a state in the eastern United States; one of the original 13 colonies; one of the Confederate States in the American Civil War
a river in the east central United States; rises in West Virginia in the Appalachian Mountains and flows eastward, forming the boundary between Maryland and Virginia, to the Chesapeake Bay