Mississippi vs Pearl River

Mississippi and Pearl River both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mississippi	Yes	No	No	No
Pearl River	Yes	No	No	No

Mississippi (noun)	Pearl River (noun)
a state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War	a river in Mississippi that flows southward to the Gulf of Mexico
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	a river in southeast China that flows into the South China Sea