river vs Garonne

river and Garonne both are nouns.

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

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