The Collaborative International Dictionary of English v.0.48:

Hateful \Hate"ful\ (-f[.u]l), a.
   1. Manifesting hate or hatred; malignant; malevolent.
      [Archaic or R.]
      [1913 Webster]

            And worse than death, to view with hateful eyes
            His rival's conquest.                 --Dryden.
      [1913 Webster]

   2. Exciting or deserving great dislike, aversion, or disgust;
      odious.
      [1913 Webster]

            Unhappy, wretched, hateful day!       --Shak.

   Syn: Odious; detestable; abominable; execrable; loathsome;
        abhorrent; repugnant; malevolent. -- Hate"ful*ly, adv.
        -- Hate"ful*ness, n.
        [1913 Webster]

WordNet (r) 3.0 (2006):

hateful
    adj 1: evoking or deserving hatred; "no vice is universally as
           hateful as ingratitude"- Joseph Priestly [ant: lovable,
           loveable]
    2: characterized by malice; "a hateful thing to do"; "in a mean
       mood" [syn: hateful, mean]

Moby Thesaurus II by Grady Ward, 1.0:

125 Moby Thesaurus words for "hateful":
   abhorrent, abominable, acrid, antagonistic, antipathetic, arrant,
   atrocious, awful, baleful, base, beastly, belligerent,
   below contempt, beneath contempt, bitchy, bitter, blameworthy,
   brutal, caustic, clashing, colliding, conflicting, contemptible,
   contemptuous, crude, cussed, deplorable, despicable, despiteful,
   detestable, dire, disgusting, dreadful, egregious, enormous, evil,
   execrable, fetid, filthy, flagrant, forbidding, foul, full of hate,
   fulsome, grievous, gross, harmful, heinous, horrible, horrid,
   hostile, ignoble, infamous, iniquitous, invidious, lamentable,
   loathsome, lousy, malefic, maleficent, malevolent, malicious,
   malign, malignant, malodorous, mean, mephitic, miasmal, miasmic,
   monstrous, nasty, nauseating, nefarious, noisome, notorious,
   noxious, objectionable, obnoxious, obscene, odious, offensive,
   ornery, outrageous, pitiable, pitiful, quarrelsome, rancorous,
   rank, rebarbative, regrettable, repellent, reprehensible,
   repugnant, repulsive, revolting, rotten, sad, scandalous, schlock,
   scurvy, set against, shabby, shameful, shocking, shoddy, sickening,
   sordid, sore, spiteful, squalid, stinking, terrible, too bad,
   unclean, unlikable, venomous, vile, villainous, virulent,
   vitriolic, wicked, woeful, worst, worthless, wretched