river vs Indus

river and Indus both are nouns.

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

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