schism

1. A split or separation within a group or organization, typically caused by discord. · A schism broke the organization into two rivals.
2. A movement or organization that splits off from a larger body. · He founded a schism that eventually rivaled the original organization in size.
3. A formal division or split within a religious body.
4. A split within Christianity whereby a group is no longer in communion with the Church or its ecclesiastical authorities, but shares essentially the same beliefs; in other words, a political split without the introduction of heresy.

Plural schisms