Araguaya vs river

Araguaya and river both are nouns.

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

Araguaya (noun)	river (noun)
a river in central Brazil that flows generally northward (with many falls) to join the Tocantins River	a large natural stream of water (larger than a creek)