Africa vs North Africa

Africa and North Africa both are nouns.

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

Africa (noun)	North 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 northern Africa between the Sahara and the Mediterranean Sea