(a.) Quarrelsome; contentious; factious; apt to breed discord\.

agitator brawler contrary contumacious defiant disaffected disobedient dissentious extremist factious fractious frondeur headstrong heady incompliant indocile insurgent insurrectional insurrectionary insurrectionist insurrecto intractable irresponsible lawless licentious malcontent maverick mutineer mutinous nonconformist noncooperating noncooperative obstreperous perverse rampant rebel rebellious recalcitrant refractory reinless revolter revolutionary revolutionist rioter seditious self-willed subversive traitor unaccountable unbridled unchecked uncompliant uncomplying uncontrolled uncooperative uncurbed undisciplined ungovernable ungoverned unreined unrestrained unruly unsubmissive wildcat willful