Rastafarian vs Rastafarianism

Rastafarian and Rastafarianism both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rastafarian	Yes	Yes	No	No
Rastafarianism	Yes	No	No	No

Rastafarian (noun)	Rastafarianism (noun)
(Ethiopia) adherents of an African religion that regards Ras Tafari as divine	a religious cult based on a belief that Ras Tafari (Haile Selassie) is the Messiah and that Africa (especially Ethiopia) is the Promised Land
follower of Rastafarianism

Rastafarian (adjective)	Rastafarianism (adjective)
of or pertaining to or characteristic of Rastafarianism or Rastafarians