How to spell MANECHAENISM correctly?

Possible correct suggestions for the misspelling "Manechaenism" include "Manichaeism" and "Manichaeanism". These terms refer to a dualistic religion founded by the Persian prophet Mani in the 3rd century CE, which combined elements of Zoroastrianism, Christianity, and Gnosticism. The movement spread throughout the Roman Empire and influenced early Christian theology.