Connecticut River vs river

Connecticut River and river both are nouns.

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

Connecticut River (noun)	river (noun)
a river in the northeastern United States; flows south from northern New Hampshire along the border between New Hampshire and Vermont and through Massachusetts and Connecticut where it empties into Long Island Sound	a large natural stream of water (larger than a creek)