Greater Maghreb vs Africa

Greater Maghreb and Africa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Greater Maghreb	Yes	No	No	No
Africa	Yes	No	No	No

Greater Maghreb (noun)	Africa (noun)
the region of northwest Africa comprising the Atlas Mountains and the coastlands of Morocco and Algeria and Tunisia	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