Mississippi vs capital of Mississippi

Mississippi and capital of Mississippi both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mississippi	Yes	No	No	No
capital of Mississippi	Yes	No	No	No

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