The Collaborative International Dictionary of English v.0.48:

Abhor \Ab*hor"\, v. i.
   To shrink back with horror, disgust, or dislike; to be
   contrary or averse; -- with from. [Obs.] "To abhor from those
   vices." --Udall.
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         Which is utterly abhorring from the end of all law.
                                                  --Milton.
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The Collaborative International Dictionary of English v.0.48:

Abhor \Ab*hor"\, v. t. [imp. & p. p. Abhorred; p. pr. & vb. n.
   Abhorring.] [L. abhorrere; ab + horrere to bristle, shiver,
   shudder: cf. F. abhorrer. See Horrid.]
   1. To shrink back with shuddering from; to regard with horror
      or detestation; to feel excessive repugnance toward; to
      detest to extremity; to loathe.
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            Abhor that which is evil; cleave to that which is
            good.                                 --Rom. xii. 9.
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   2. To fill with horror or disgust. [Obs.]
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            It doth abhor me now I speak the word. --Shak.
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   3. (Canon Law) To protest against; to reject solemnly. [Obs.]
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            I utterly abhor, yea, from my soul
            Refuse you for my judge.              --Shak.
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   Syn: To hate; detest; loathe; abominate. See Hate.
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WordNet (r) 3.0 (2006):

abhor
    v 1: find repugnant; "I loathe that man"; "She abhors cats"
         [syn: abhor, loathe, abominate, execrate]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "abhor":
   abominate, be hostile to, contemn, detest, disapprove of, disdain,
   disfavor, dislike, disrelish, execrate, hate, hold in abomination,
   loathe, mislike, not care for, scorn, scout, shudder at,
   utterly detest