The Collaborative International Dictionary of English v.0.48:

Vandalism \Van"dal*ism\, n.
   The spirit or conduct of the Vandals; ferocious cruelty;
   hostility to the arts and literature, or willful destruction
   or defacement of any object of beauty or value.
   [1913 Webster]

WordNet (r) 3.0 (2006):

vandalism
    n 1: willful wanton and malicious destruction of the property of
         others [syn: vandalism, hooliganism, malicious
         mischief]

Moby Thesaurus II by Grady Ward, 1.0:

111 Moby Thesaurus words for "vandalism":
   acuteness, animality, atrociousness, atrocity, badness, barbarity,
   barbarousness, beastliness, bestiality, bloodbath, bloodiness,
   bloodlust, bloodthirst, bloodthirstiness, bloody-mindedness,
   blue ruin, breakup, brutality, brutalness, brutishness,
   cannibalism, carnage, consumption, cruelness, cruelty, damnation,
   decimation, depredation, desolation, despoilment, despoliation,
   destruction, destructiveness, devastation, discourtesy,
   disintegration, disorder, disorderliness, disorderly conduct,
   disorganization, disruption, disruptiveness, dissolution,
   extremity, ferociousness, ferocity, fiendishness, fierceness,
   force, frowned-upon behavior, furiousness, harshness, havoc,
   hecatomb, holocaust, hooliganism, horseplay, impetuosity,
   impropriety, inclemency, inhumaneness, inhumanity, intensity,
   malignity, mercilessness, mindlessness, misbehavior, misconduct,
   misdemeanor, misdoing, murderousness, naughtiness,
   nonsanctioned behavior, perdition, pitilessness, ravage, rigor,
   roughhouse, roughness, rowdiness, rowdyism, ruffianism, ruin,
   ruination, ruthlessness, sadism, sadistic cruelty, sanguineousness,
   savagery, severity, shambles, sharpness, slaughter, spoliation,
   terrorism, truculence, undoing, ungentleness, vehemence,
   venial sin, venom, vice, viciousness, violence, virulence,
   wanton cruelty, waste, wrack, wrack and ruin, wreck, wrongdoing