Zurvanism vs religious sect

Zurvanism and religious sect both are nouns.

Word	Noun	Adjective	Verb	Adverb
Zurvanism	Yes	No	No	No
religious sect	Yes	No	No	No

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

Zurvanism: a Zoroastrian sect that claims Zurvan was the ultimate source of the universe
religious sect: a subdivision of a larger religious group

Other hypernyms of Zurvanism include religious order, sect.

Zurvanism (noun)	religious sect (noun)
a heretical Zoroastrian doctrine holding that Zurvan was the ultimate source of the universe and that both Ahura Mazda and Ahriman were Zurvan's offspring	a subdivision of a larger religious group
a Zoroastrian sect that claims Zurvan was the ultimate source of the universe