St. Francis River vs MO

St. Francis River and MO both are nouns.

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

St. Francis River (noun)	MO (noun)
a tributary of the Mississippi River that rises in Missouri and flows southeastward through Arkansas	a midwestern state in central United States; a border state during the American Civil War, Missouri was admitted to the Confederacy without actually seceding from the Union