Washington vs capital of Washington

Washington and capital of Washington both are nouns.

Word	Noun	Adjective	Verb	Adverb
Washington	Yes	No	No	No
capital of Washington	Yes	No	No	No

Washington (noun)	capital of Washington (noun)
the federal government of the United States	capital of the state of Washington; located in western Washington on Puget Sound
a state in northwestern United States on the Pacific with capital Olympia
the capital of the United States in the District of Columbia and a tourist mecca; George Washington commissioned Charles L'Enfant to lay out the city in 1791
1st President of the United States; commander-in-chief of the Continental Army during the American Revolution (1732-1799)
United States educator who was born a slave but became educated and founded a college at Tuskegee in Alabama (1856-1915)