Ouse River vs Ouse

Ouse River and Ouse both are nouns.

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

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

Ouse River and Ouse: a river in northeastern England that flows generally southeastward to join the Trent River and form the Humber

Other synonyms of Ouse River include River Ouse.

Ouse River (noun)	Ouse (noun)
a river in northeastern England that flows generally southeastward to join the Trent River and form the Humber	a river in northeastern England that flows generally southeastward to join the Trent River and form the Humber