Washington vs Washingtonian

Washington and Washingtonian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Washington	Yes	No	No	No
Washingtonian	Yes	Yes	No	No

Washington (noun)	Washingtonian (noun)
the federal government of the United States	a native or resident of the state of Washington
a state in northwestern United States on the Pacific with capital Olympia	a native or resident of the city of Washington
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)

Washington (adjective)	Washingtonian (adjective)
	of or relating to or in the state of Washington
	of or relating to the capital of the United States
	of or relating to the people who run the federal government
	of or relating to or in the manner of George Washington