rebel

nouns

a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions)
freedom fighter, insurgent, insurrectionist, rebel
someone who exhibits great independence in thought and action
maverick, rebel

verbs

take part in a rebellion; renounce a former allegiance
arise, rebel, rise, rise up
is derived from
rebellion
break with established customs
rebel, renegade
is derived from
rebellion