1. 
[syn: disruptive, riotous, troubled, tumultuous, turbulent]
The Collaborative International Dictionary of English v.0.48:
Disruptive \Dis*rupt"ive\, a.
   Causing, or tending to cause, disruption; caused by
   disruption; breaking through; bursting; as, the disruptive
   discharge of an electrical battery. --Nichol.
   [1913 Webster]
WordNet (r) 3.0 (2006):
disruptive
    adj 1: characterized by unrest or disorder or insubordination;
           "effects of the struggle will be violent and disruptive";
           "riotous times"; "these troubled areas"; "the tumultuous
           years of his administration"; "a turbulent and unruly
           childhood" [syn: disruptive, riotous, troubled,
           tumultuous, turbulent]
Moby Thesaurus II by Grady Ward, 1.0:
32 Moby Thesaurus words for "disruptive":
   ablative, bad, biodegradable, corrosive, decomposable, decomposing,
   degradable, dilapidated, disintegrable, disintegrated,
   disintegrating, disintegrative, disjunctive, disorderly, erosive,
   improper, misbehaving, moldering, naughty, not respectable,
   off-base, out-of-line, ravaged, resolvent, rowdy, rowdyish,
   ruffianly, ruinous, separative, solvent, unbehaving, worn