instigant
1. [ noun ] someone who deliberately foments trouble
Synonyms: provoker inciter firebrand instigator
Examples:

"she was the instigator of their quarrel"

Related terms: troublemaker ringleader harass incite
Similar spelling:   instigate
  instant
  instigator
  instigation
  instinct
  instigative
  insatiate
  instantly
  instilment
  instilling
  inactivate
  instantiate
  instinctual
  instinctive
  instillator
  inaction
  instancy
  instance
  instillation
  instillment
  inactivation
  institute
  instil
  inmost
  insatiably
  insatiable
  institution
  inestimable
  in-situ
  instill
  inactivity
  in_situ