Africa vs Republic of Liberia

Africa and Republic of Liberia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Africa	Yes	No	No	No
Republic of Liberia	Yes	No	No	No

Africa (noun)	Republic of Liberia (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	a republic in West Africa; established in 1822 by Americans as a way to free negro slaves