noun
a person who promotes division or dissension, especially within a religious group
adjective
relating to or characteristic of a schism or schisms
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The schismatic group broke away from the main church due to theological differences.
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The schismatic faction split off from the rest of the organization over disagreements.
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Those schismatic troublemakers caused a rift in the community.
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His schismatic behavior caused division among the team members.