Akademik

instigant
noun
someone who deliberately foments trouble
-

she was the instigator of their quarrel

Syn: ↑instigator, ↑provoker, ↑inciter, ↑firebrand
Derivationally related forms: ↑instigate, ↑incite (for: ↑inciter), ↑provoke (for: ↑provoker), ↑instigate (for: ↑instigator)
Hypernyms: ↑troublemaker, ↑trouble maker, ↑troubler, ↑mischief-maker, ↑bad hat
Hyponyms: ↑ringleader

Useful english dictionary. 2012.