1. Someone who deliberately foments trouble
   "she was the instigator of their quarrel"
   - provoker, inciter, instigant, firebrand 
2. A person who initiates a course of action
   - initiator

Derived forms: instigators

See also: instigate

Type of: bad hat, leader, mischief-maker, trouble maker, troublemaker, troubler

Encyclopedia: Instigator

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• heal
• heal all
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• health
• Health and Human Services
• health care provider
• health check