River Adige vs river

River Adige and river both are nouns.

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

River Adige (noun)	river (noun)
a river in northern Italy that flows southeast into the Adriatic Sea	a large natural stream of water (larger than a creek)