religious cult vs obi

religious cult and obi both are nouns.

Word	Noun	Adjective	Verb	Adverb
religious cult	Yes	No	No	No
obi	Yes	No	No	No

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

religious cult: a system of religious beliefs and rituals
obi: a religious belief of African origin involving witchcraft and sorcery; practiced in parts of the West Indies and tropical Americas

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

religious cult (noun)	obi (noun)
a system of religious beliefs and rituals	a religious belief of African origin involving witchcraft and sorcery; practiced in parts of the West Indies and tropical Americas
	(West Indies) followers of a religious system involving witchcraft and sorcery