instigator

Definitions of instigator
1

n someone who deliberately foments trouble

“she was the instigator of their quarrel”
Synonyms:
firebrand, inciter, instigant, provoker
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

n a person who initiates a course of action

Synonyms:
initiator
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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