Greater Maghreb vs Mahgrib

Greater Maghreb and Mahgrib both are nouns.

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

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

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

Other synonyms of Greater Maghreb include Maghreb.

Greater Maghreb (noun)	Mahgrib (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