Brahmaputra River vs river

Brahmaputra River and river both are nouns.

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

Brahmaputra River (noun)	river (noun)
an Asian river; flows into the Bay of Bengal	a large natural stream of water (larger than a creek)