Neosho vs river

Neosho and river both are nouns.

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

Neosho (noun)	river (noun)
a river that rises in eastern Kansas and flows eastward into Oklahoma to become a tributary of the Arkansas River	a large natural stream of water (larger than a creek)