Mississippi vs Tombigbee

Mississippi and Tombigbee both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mississippi	Yes	No	No	No
Tombigbee	Yes	No	No	No

Mississippi (noun)	Tombigbee (noun)
a state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War	a river that rises in northeastern Mississippi and flows southward through western Alabama to join the Alabama River and form the Mobile River
a major North American river and the chief river of the United States; rises in northern Minnesota and flows southward into the Gulf of Mexico