Saone vs Saone River

Saone and Saone River both are nouns.

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

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

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

Saone (noun)	Saone River (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