cult vs Rastafarianism

cult and Rastafarianism both are nouns.

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

As nouns, Rastafarianism is a hyponym of cult; that is, Rastafarianism is a word with a more specific, narrower meaning than cult:

cult: a system of religious beliefs and rituals
Rastafarianism: a religious cult based on a belief that Ras Tafari (Haile Selassie) is the Messiah and that Africa (especially Ethiopia) is the Promised Land

Other hyponyms of cult include cargo cult, macumba, obeah, obi, hoodooism, vodoun, voodoo, voodooism, sabianism.

cult (noun)	Rastafarianism (noun)
a system of religious beliefs and rituals	a religious cult based on a belief that Ras Tafari (Haile Selassie) is the Messiah and that Africa (especially Ethiopia) is the Promised Land
an interest followed with exaggerated zeal
a religion or sect that is generally considered to be unorthodox, extremist, or false
followers of an exclusive system of beliefs and practices
followers of an unorthodox, extremist, or false religion or sect who often live outside of conventional society under the direction of a charismatic leader