instigator

Definitions of instigator
  1. noun
    someone who deliberately foments trouble
    “she was the instigator of their quarrel”
    synonyms: firebrand, inciter, instigant, provoker
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    types:
    ringleader
    a person who leads (especially in illicit activities)
    type of:
    bad hat, mischief-maker, trouble maker, troublemaker, troubler
    someone who deliberately stirs up trouble
  2. noun
    a person who initiates a course of action
    synonyms: initiator
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    types:
    aggressor
    a confident assertive person who acts as instigator
    type of:
    leader
    a person who rules or guides or inspires others
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