Nubia vs Africa

Nubia and Africa both are nouns.

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

Nubia (noun)	Africa (noun)
an ancient region of northeastern Africa (southern Egypt and northern Sudan) on the Nile; much of Nubia is now under Lake Nasser	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