Africa vs Sub-Saharan Africa

Africa and Sub-Saharan Africa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Africa	Yes	No	No	No
Sub-Saharan Africa	Yes	No	No	No

Africa (noun)	Sub-Saharan 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	the region of Africa to the south of the Sahara Desert