Clyde vs River Clyde

Clyde and River Clyde both are nouns.

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

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

Clyde and River Clyde: a river in western Scotland that flows from the southern uplands into the Firth of Clyde; navigable by oceangoing vessels as far as Glasgow

Clyde (noun)	River Clyde (noun)
a river in western Scotland that flows from the southern uplands into the Firth of Clyde; navigable by oceangoing vessels as far as Glasgow	a river in western Scotland that flows from the southern uplands into the Firth of Clyde; navigable by oceangoing vessels as far as Glasgow