sabianism vs religious cult

sabianism and religious cult both are nouns.

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

As nouns, religious cult is a hypernym of sabianism; that is, religious cult is a word with a broader meaning than sabianism:

sabianism: the religion of a group mentioned in the Koran as entitled to Muslim religious toleration along with Jews and Christians and usually identified with the Mandaeans or the Elkesaites.
religious cult: a system of religious beliefs and rituals

Other hypernyms of sabianism include cult, cultus.

sabianism (noun)	religious cult (noun)
the religion of a group mentioned in the Koran as entitled to Muslim religious toleration along with Jews and Christians and usually identified with the Mandaeans or the Elkesaites.	a system of religious beliefs and rituals