Housatonic vs Housatonic River

Housatonic and Housatonic River both are nouns.

Word	Noun	Adjective	Verb	Adverb
Housatonic	Yes	No	No	No
Housatonic River	Yes	No	No	No

As nouns, Housatonic and Housatonic River are synonyms defined as:

Housatonic and Housatonic River: a river that rises in western Massachusetts and flows south through Connecticut to empty into Long Island Sound

Housatonic (noun)	Housatonic River (noun)
a river that rises in western Massachusetts and flows south through Connecticut to empty into Long Island Sound	a river that rises in western Massachusetts and flows south through Connecticut to empty into Long Island Sound