The Collaborative International Dictionary of English v.0.48:

Aversion \A*ver"sion\, n. [L. aversio: cf. F. aversion. See
   Avert.]
   1. A turning away. [Obs.]
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            Adhesion to vice and aversion from goodness. --Bp.
                                                  Atterbury.
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   2. Opposition or repugnance of mind; fixed dislike;
      antipathy; disinclination; reluctance.
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            Mutual aversion of races.             --Prescott.
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            His rapacity had made him an object of general
            aversion.                             --Macaulay.
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   Note: It is now generally followed by to before the object.
         [See Averse.] Sometimes towards and for are found;
         from is obsolete.
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               A freeholder is bred with an aversion to
               subjection.                        --Addison.
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               His aversion towards the house of York. --Bacon.
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               It is not difficult for a man to see that a
               person has conceived an aversion for him.
                                                  --Spectator.
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               The Khasias . . . have an aversion to milk. --J.
                                                  D. Hooker.
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   3. The object of dislike or repugnance.
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            Pain their aversion, pleasure their desire. --Pope.
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   Syn: Antipathy; dislike; repugnance; disgust. See Dislike.
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WordNet (r) 3.0 (2006):

aversion
    n 1: a feeling of intense dislike [syn: antipathy, aversion,
         distaste]
    2: the act of turning yourself (or your gaze) away; "averting
       her gaze meant that she was angry" [syn: aversion,
       averting]

Moby Thesaurus II by Grady Ward, 1.0:

95 Moby Thesaurus words for "aversion":
   Anglophobia, Russophobia, abhorrence, abomination, allergy,
   anathema, animosity, antagonism, anti-Semitism, antipathy,
   averseness, backwardness, bad books, bigotry, cold sweat,
   creeping flesh, cursoriness, despitefulness, detestation,
   disagreement, disfavor, disgust, disinclination, dislike,
   disliking, disobedience, displeasure, disrelish, dissatisfaction,
   dissent, distaste, dread, enmity, execration, fear, foot-dragging,
   fractiousness, grudging consent, grudgingness, hate, hatred,
   horror, hostility, indisposedness, indisposition, indocility,
   intractableness, lack of enthusiasm, lack of zeal, loathing,
   malevolence, malice, malignity, misandry, misanthropy, misogyny,
   mortal horror, mutinousness, nausea, nolition, obstinacy, odium,
   opposition, peeve, perfunctoriness, pet peeve, phobia, race hatred,
   racism, recalcitrance, recalcitrancy, refractoriness, refusal,
   reluctance, renitence, renitency, repellency, repugnance,
   repulsion, resistance, revulsion, shuddering, slowness, spite,
   spitefulness, stubbornness, sulk, sulkiness, sulks, sullenness,
   unenthusiasm, unwillingness, vials of hate, vials of wrath,
   xenophobia