river vs Canadian River

river and Canadian River both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
Canadian River	Yes	No	No	No

river (noun)	Canadian River (noun)
a large natural stream of water (larger than a creek)	a river rising in northeastern New Mexico and flowing eastward across the Texas panhandle to become a tributary of the Arkansas River in Oklahoma