The Collaborative International Dictionary of English v.0.48:

Insubordination \In`sub*or`di*na"tion\, n. [Cf. F.
   insubordination.]
   The quality of being insubordinate; disobedience to lawful
   authority.
   [1913 Webster]

WordNet (r) 3.0 (2006):

insubordination
    n 1: defiance of authority [ant: subordination]
    2: an insubordinate act [syn: insubordination,
       rebelliousness]

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "insubordination":
   civil disobedience, disobedience, frowardness, indiscipline,
   indocility, infraction, infringement, interregnum, intractability,
   irresponsibility, lawbreaking, lawlessness, license,
   licentiousness, mutiny, naughtiness, noncompliance, nonconformity,
   noncooperation, nonobedience, passive resistance, power vacuum,
   rampant will, recusancy, transgression, unaccountability,
   uncontrol, uncooperativeness, unduteousness, undutifulness,
   unrestraint, unsubmissiveness, violation, waywardness,
   willful disobedience, willfulness