| iconoclast(noun, resistance, rebel, progressive, revolutionary) |
| immoderate |
| inciter(radical, partisan, reactionary, leftist, malcontent) |
| independent(resistance, rebel, recreant, insurgent, protester) |
| individualist(resistance, rebel, recreant, insurgent, protester) |
| innovator(resistance, rebel, recreant, insurgent, protester) |
| instigator(radical, partisan, reactionary, leftist, malcontent) |
| insubordinate(adjective, riotous, rebellious) |
| left-wing extremist |
| leftist(noun, radical, rebel, progressive, partisan) |
| lunatic fringe |
| maverick(noun, insurgent, protester, objector) |
| mild radical |
| militant |
| mover(radical, partisan, reactionary, leftist, malcontent) |
| mutinous(adjective, riotous, rebellious) |
| nonconformist(resistance, rebel, progressive, revolutionary, recreant) |
| objector(rebel, fanatic, progressive, revolutionary, insurgent) |
| opponent(resistance, rebel, recreant, insurgent, protester) |
| overthrower(resistance, rebel, recreant, insurgent, protester) |