Tyne vs River Tyne

Tyne and River Tyne both are nouns.

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

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

Tyne and River Tyne: a river in northern England that flows east to the North Sea

Other synonyms of Tyne include Tyne River.

Tyne (noun)	River Tyne (noun)
a river in northern England that flows east to the North Sea	a river in northern England that flows east to the North Sea