Ganges vs river

Ganges and river both are nouns.

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

Ganges (noun)	river (noun)
an Asian river; rises in the Himalayas and flows east into the Bay of Bengal; a sacred river of the Hindus	a large natural stream of water (larger than a creek)