Surinam River vs Suriname River

Surinam River and Suriname River both are nouns.

Word	Noun	Adjective	Verb	Adverb
Surinam River	Yes	No	No	No
Suriname River	Yes	No	No	No

As nouns, Surinam River and Suriname River are synonyms defined as:

Surinam River and Suriname River: a river in Suriname that flows northward to the Atlantic

Surinam River (noun)	Suriname River (noun)
a river in Suriname that flows northward to the Atlantic	a river in Suriname that flows northward to the Atlantic