Murrumbidgee vs river

Murrumbidgee and river both are nouns.

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

Murrumbidgee (noun)	river (noun)
a river of southeastern Australia; flows westward into the Murray River	a large natural stream of water (larger than a creek)