river vs Brahmaputra

river and Brahmaputra both are nouns.

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

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