river vs Arkansas

river and Arkansas both are nouns.

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

river (noun)	Arkansas (noun)
a large natural stream of water (larger than a creek)	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