mutineer

from WordNet (r) 3.0 (2006)

mutineer
    n 1: someone who is openly rebellious and refuses to obey
         authorities (especially seamen or soldiers)

from The Collaborative International Dictionary of English v.0.48

Mutineer \Mu"ti*neer`\, n. [See {Mutiny}.]
   One guilty of mutiny.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

43 Moby Thesaurus words for "mutineer":
      agitator, anarch, anarchist, anarcho-syndicalist, antinomian,
      arise, brawler, extremist, frondeur, insubordinate, insurge,
      insurgent, insurrect, insurrectionary, insurrectionist, insurrecto,
      malcontent, maverick, mount the barricades, mutiny, nihilist,
      nonconformist, overthrow, rebel, reluct, reluctate, revolt,
      revolter, revolute, revolution, revolutionary, revolutionist,
      revolutionize, riot, rioter, rise, rise up, run riot, strike,
      subversive, subvert, syndicalist, traitor