Confederate States of America vs Mississippi

Confederate States of America and Mississippi both are nouns.

Word	Noun	Adjective	Verb	Adverb
Confederate States of America	Yes	No	No	No
Mississippi	Yes	No	No	No

Confederate States of America (noun)	Mississippi (noun)
the southern states that seceded from the United States in 1861	a state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War
	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