Arkansas vs AR

Arkansas and AR both are nouns.

Word	Noun	Adjective	Verb	Adverb
Arkansas	Yes	No	No	No
AR	Yes	No	No	No

As nouns, Arkansas and AR are synonyms defined as:

Arkansas and AR: a state in south central United States; one of the Confederate states during the American Civil War

Other synonyms of Arkansas include Ark., Land of Opportunity.

Arkansas (noun)	AR (noun)
a state in south central United States; one of the Confederate states during the American Civil War	a state in south central United States; one of the Confederate states during the American Civil War
a river that rises in the Rocky Mountains in Colorado and flows southeast through Kansas and Oklahoma and through Arkansas to become a tributary of the Mississippi River