The Collaborative International Dictionary of English v.0.48:

Taunting \Taunt"ing\,
   a. & n. from Taunt, v.
   [1913 Webster]

         Every kind of insolent and taunting reflection.
                                                  --Burke.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Taunt \Taunt\, v. t. [imp. & p. p. Taunted; p. pr. & vb. n.
   Taunting.] [Earlier, to tease; probably fr. OF. tanter to
   tempt, to try, for tenter. See Tempt.]
   To reproach with severe or insulting words; to revile; to
   upbraid; to jeer at; to flout.
   [1913 Webster]

         When I had at my pleasure taunted her.   --Shak.
   [1913 Webster]

   Syn: To deride; ridicule; mock; jeer; flout; revile. See
        Deride.
        [1913 Webster]

WordNet (r) 3.0 (2006):

taunting
    adj 1: abusing vocally; expressing contempt or ridicule;
           "derisive laughter"; "a jeering crowd"; "her mocking
           smile"; "taunting shouts of `coward' and `sissy'" [syn:
           derisive, gibelike, jeering, mocking, taunting]
    n 1: aggravation by deriding or mocking or criticizing [syn:
         twit, taunt, taunting]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "taunting":
   banter, bantering, booing, catcalling, chaffing, derision,
   derisive, derisory, fleering, flippancy, flippant, fooling,
   grinning, hissing, hooting, jeering, joshing, kidding, leering,
   levity, mockery, mocking, panning, quizzical, ragging, railing,
   raillery, rallying, razzing, ridicule, ridiculing, roasting,
   scoffing, smart, smart-aleckiness, smart-alecky, smart-ass,
   smartness, smirking, sneering, snickering, sniggering, snorting,
   teasing, twitting