river vs St. Francis River

river and St. Francis River both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
St. Francis River	Yes	No	No	No

river (noun)	St. Francis River (noun)
a large natural stream of water (larger than a creek)	a tributary of the Mississippi River that rises in Missouri and flows southeastward through Arkansas