Indus vs river

Indus and river both are nouns.

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

Indus (noun)	river (noun)
an Asian river that rises in Tibet and flows through northern India and then southwest through Kashmir and Pakistan to the Arabian Sea	a large natural stream of water (larger than a creek)
a faint constellation in the Southern Hemisphere near Telescopium and Tucana