Sabine River vs Sabine

Sabine River and Sabine both are nouns.

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

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

Sabine River and Sabine: a river in eastern Texas that flows south into the Gulf of Mexico

Sabine River (noun)	Sabine (noun)
a river in eastern Texas that flows south into the Gulf of Mexico	a river in eastern Texas that flows south into the Gulf of Mexico
	a member of an ancient Oscan-speaking people of the central Apennines north of Rome who were conquered and assimilated into the Roman state in 290 BC

Sabine River (adjective)	Sabine (adjective)
	of or relating to or characteristic of the Sabines