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

"she was the instigator of their quarrel"

Related terms: troublemaker ringleader harass incite
Similar spelling:   incite
  insider
  inactivate
  incitive
  inactive
  institute
  instep
  inside
  incitement
  instead
  in-situ
  in_situ
  inst
  inositol
  incident
  inaction
  inset
  ingot
  incidence