Garonne vs Garonne River

Garonne and Garonne River both are nouns.

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

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

Garonne and Garonne River: a river that rises in the Pyrenees and flows northwest to the Bay of Biscay

Garonne (noun)	Garonne River (noun)
a river that rises in the Pyrenees and flows northwest to the Bay of Biscay	a river that rises in the Pyrenees and flows northwest to the Bay of Biscay