cultus vs obeah

cultus and obeah both are nouns.

Word	Noun	Adjective	Verb	Adverb
cultus	Yes	No	No	No
obeah	Yes	No	No	No

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

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

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

cultus (noun)	obeah (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