The Collaborative International Dictionary of English v.0.48:

Vandal \Van"dal\, Vandalic \Van*dal"ic\, a.
   Of or pertaining to the Vandals; resembling the Vandals in
   barbarism and destructiveness.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Vandal \Van"dal\, n. [L. Vandalus, Vandalius; of Teutonic
   origin, and probably originally signifying, a wanderer. Cf.
   Wander.]
   [1913 Webster]
   1. (Anc. Hist.) One of a Teutonic race, formerly dwelling on
      the south shore of the Baltic, the most barbarous and
      fierce of the northern nations that plundered Rome in the
      5th century, notorious for destroying the monuments of art
      and literature.
      [1913 Webster]

   2. Hence, one who willfully destroys or defaces any work of
      art or literature, or anything valluable.
      [1913 Webster]

            The Vandals of our isle,
            Sworn foes to sense and law.          --Cowper.
      [1913 Webster] Vandal

WordNet (r) 3.0 (2006):

vandal
    n 1: someone who willfully destroys or defaces property
    2: a member of the Germanic people who overran Gaul and Spain
       and North Africa and sacked Rome in 455

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "vandal":
   animal, annihilator, anthropophagite, arsonist, barbarian, beast,
   biblioclast, bomber, brute, burner, cannibal, demolisher,
   despoiler, destroyer, dynamitard, dynamiter, exterminator, hoodlum,
   hooligan, hun, hyena, iconoclast, idol breaker, idoloclast, looter,
   lout, man-eater, nihilist, pillager, plunderer, ravager, ruffian,
   ruiner, savage, shark, spoiler, spoliator, syndicalist, terrorist,
   tiger, wild man, wrecker