Saone River vs Saone

Saone River and Saone both are nouns.

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

As nouns, Saone River and Saone are synonyms defined as:

Saone River and Saone: a river in eastern France; rises in Lorraine and flows south to become the chief tributary of the Rhone

Saone River (noun)	Saone (noun)
a river in eastern France; rises in Lorraine and flows south to become the chief tributary of the Rhone	a river in eastern France; rises in Lorraine and flows south to become the chief tributary of the Rhone