Yellow River vs river

Yellow River and river both are nouns.

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

Yellow River (noun)	river (noun)
a major river of Asia in northern China; flows generally eastward into the Yellow Sea; carries large quantities of yellow silt to its delta	a large natural stream of water (larger than a creek)