Africa vs West Africa

Africa and West Africa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Africa	Yes	No	No	No
West Africa	Yes	No	No	No

Africa (noun)	West Africa (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 area of western Africa between the Sahara Desert and the Gulf of Guinea