Greater Maghreb vs Maghreb

Greater Maghreb and Maghreb both are nouns.

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

As nouns, Greater Maghreb and Maghreb are synonyms defined as:

Greater Maghreb and Maghreb: the region of northwest Africa comprising the Atlas Mountains and the coastlands of Morocco and Algeria and Tunisia

Other synonyms of Greater Maghreb include Mahgrib.

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