Garonne River vs river

Garonne River and river both are nouns.

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

Garonne River (noun)	river (noun)
a river that rises in the Pyrenees and flows northwest to the Bay of Biscay	a large natural stream of water (larger than a creek)