Potomac vs Old Line State

Potomac and Old Line State both are nouns.

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

Potomac (noun)	Old Line State (noun)
term sometimes used to refer to Washington, D.C.	a Mid-Atlantic state; one of the original 13 colonies, with capital Annapolis
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