Garonne River vs Garonne

Garonne River and Garonne both are nouns.

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

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

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

Garonne River (noun)	Garonne (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