- instigator, provoker, inciter, instigant, firebrand - someone who deliberately foments trouble; "she was the instigator of their quarrel"
--1 is a kind of troublemaker, trouble maker, troubler, mischief-maker, bad hat
--1 has particulars: ringleaderDerived form: verb instigate1 - instigator, initiator - a person who initiates a course of action
--2 is a kind of leader
--2 has particulars: aggressorDerived form: verb instigate2