Mississippi vs American state

Mississippi and American state both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mississippi	Yes	No	No	No
American state	Yes	No	No	No

Mississippi (noun)	American state (noun)
a state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War	one of the 50 states of the United States
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