The Collaborative International Dictionary of English v.0.48:

Vituperative \Vi*tu"per*a*tive\, a.
   Uttering or writing censure; containing, or characterized by,
   abuse; scolding; abusive. -- Vi*tu"per*a*tive*ly, adv.
   [1913 Webster]

         Vituperative appellations derived from their real or
         supposed ill qualities.                  --B. Jonson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

vituperative
    adj 1: marked by harshly abusive criticism; "his scathing
           remarks about silly lady novelists"; "her vituperative
           railing" [syn: scathing, vituperative]

Moby Thesaurus II by Grady Ward, 1.0:

75 Moby Thesaurus words for "vituperative":
   Rabelaisian, abusive, acid, belittling, biting, blackening,
   blameful, blasphemous, calumniatory, calumnious, castigatory,
   censorious, comminatory, condemnatory, contemptuous, contumelious,
   critical, cursing, damnatory, damning, defamatory, denunciatory,
   deprecative, deprecatory, depreciative, depreciatory, derisive,
   derogatory, detractory, dirty, disparaging, dysphemistic,
   epithetic, excommunicative, excommunicatory, execrating,
   execrative, execratory, foul, fulminatory, harsh, imprecatory,
   insulting, invective, inveighing, judgmental, maledictory, malign,
   objurgatory, obscene, opprobrious, priggish, profane, railing, raw,
   reproachful, reprobative, reviling, ribald, ridiculing, risque,
   sarcastic, sardonic, scatologic, scoffing, scolding, scornful,
   scurrile, scurrilous, severe, slanderous, truculent, vile,
   vilifying, withering