Manichaean vs Manichaeism

Manichaean and Manichaeism both are nouns.

Word	Noun	Adjective	Verb	Adverb
Manichaean	Yes	Yes	No	No
Manichaeism	Yes	No	No	No

Manichaean (noun)	Manichaeism (noun)
an adherent of Manichaeism	a religion founded by Manes in the third century; a synthesis of Zoroastrian dualism between light and dark and Babylonian folklore and Buddhist ethics and superficial elements of Christianity; spread widely in the Roman Empire but had largely died out by 1000

Manichaean (adjective)	Manichaeism (adjective)
of or relating to Manichaeism
of or relating to the philosophical doctrine of dualism