river vs Saale River

river and Saale River both are nouns.

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

river (noun)	Saale River (noun)
a large natural stream of water (larger than a creek)	a river that rises in central Germany and flows north to join the Elbe River