river vs Saone River

river and Saone River both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
Saone River	Yes	No	No	No

river (noun)	Saone River (noun)
a large natural stream of water (larger than a creek)	a river in eastern France; rises in Lorraine and flows south to become the chief tributary of the Rhone