agent provocateur, agitator, agitprop, catalyst, demagogue, exciter, firebrand, fomenter, gadfly, incendiary, inciter, inflamer, instigator, malcontent, meddler, mischief-maker, provocateur, provoker, rabble-rouser, ringleader, rouser, scandalmonger, seditionary, seditionist, stormy petrel, urger

For further exploring for "troublemaker" in Webster Dictionary Online

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TIP #18: Strengthen your daily devotional life with NET Bible Daily Reading Plan. [ALL]

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