Manichean vs Manichaeism

Manichean and Manichaeism both are nouns.

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

Manichean (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

Manichean (adjective)	Manichaeism (adjective)
of or relating to Manichaeism