Chattahoochee vs river

Chattahoochee and river both are nouns.

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

Chattahoochee (noun)	river (noun)
a river rising in northern Georgia and flowing southwest and south to join the Flint River at the Florida border where they form the Apalachicola River	a large natural stream of water (larger than a creek)