Arkansas vs CO

Arkansas and CO both are nouns.

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

Arkansas (noun)	CO (noun)
a state in south central United States; one of the Confederate states during the American Civil War	a state in west central United States in the Rocky Mountains
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	one who refuses to serve in the armed forces on grounds of conscience
	an odorless very poisonous gas that is a product of incomplete combustion of carbon