Africa vs Shari River

Africa and Shari River both are nouns.

Word	Noun	Adjective	Verb	Adverb
Africa	Yes	No	No	No
Shari River	Yes	No	No	No

Africa (noun)	Shari River (noun)
the second largest continent; located to the south of Europe and bordered to the west by the South Atlantic and to the east by the Indian Ocean	an African river that flows northwest into Lake Chad