Manichaeanism is a term typically used to describe a dualistic religious philosophy, but there are several synonyms that can be used to capture different nuances of this idea. One alternative term is Gnosticism, which emphasizes the importance of secret knowledge for attaining salvation. Another similar word is Zoroastrianism, which highlights the concept of a cosmic struggle between good and evil. Alternatively, the term dualism can be used to describe any philosophy that posits the existence of two opposing principles. Finally, the term eschatology can be used to describe the focus on the end times and the ultimate destiny of humanity, which is a key aspect of many Manichaean beliefs.