Arkansas vs river

Arkansas and river both are nouns.

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

Arkansas (noun)	river (noun)
a state in south central United States; one of the Confederate states during the American Civil War	a large natural stream of water (larger than a creek)
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