The Collaborative International Dictionary of English v.0.48:

Antipathy \An*tip"a*thy\, n.; pl. Antipathies. [L. antipathia,
   Gr. ?; 'anti` against + ? to suffer. Cf. F. antipathie. See
   Pathos.]
   1. Contrariety or opposition in feeling; settled aversion or
      dislike; repugnance; distaste.
      [1913 Webster]

            Inveterate antipathies against particular nations,
            and passionate attachments to others, are to be
            avoided.                              --Washington.
      [1913 Webster]

   2. Natural contrariety; incompatibility; repugnancy of
      qualities; as, oil and water have antipathy.
      [1913 Webster]

            A habit is generated of thinking that a natural
            antipathy exists between hope and reason. --I.
                                                  Taylor.
      [1913 Webster]

   Note: Antipathy is opposed to sympathy. It is followed by
         to, against, or between; also sometimes by for.
         [1913 Webster]

   Syn: Hatred; aversion; dislike; disgust; distaste; enmity;
        ill will; repugnance; contrariety; opposition. See
        Dislike.
        [1913 Webster]

WordNet (r) 3.0 (2006):

antipathy
    n 1: a feeling of intense dislike [syn: antipathy, aversion,
         distaste]
    2: the object of a feeling of intense aversion; something to be
       avoided; "cats were his greatest antipathy"

Moby Thesaurus II by Grady Ward, 1.0:

146 Moby Thesaurus words for "antipathy":
   Anglophobia, Russophobia, abhorrence, abomination, allergy,
   anathema, animosity, animus, antagonism, anti-Semitism, antithesis,
   averseness, aversion, avoidance, backlash, backwardness, bad blood,
   belligerence, bigotry, clash, clashing, cold sweat, collision,
   competition, conflict, confrontation, confutation, contention,
   contradiction, contradistinction, contraindication, contraposition,
   contrariety, contrariness, contrast, counteraction,
   counterposition, counterworking, crankiness, creeping flesh,
   cross-purposes, crotchetiness, cursoriness, despitefulness,
   detestation, disaccord, disagreement, discrepancy, disgust,
   disinclination, dislike, disobedience, disrelish, dissension,
   dissent, distaste, enmity, escape, eschewal, evasion, execration,
   foot-dragging, fractiousness, friction, grudging consent,
   grudgingness, hate, hatred, horror, hostility, inconsistency,
   indisposedness, indisposition, indocility, inimicalness,
   interference, intractableness, kick, lack of enthusiasm,
   lack of zeal, loathing, malevolence, malice, malignity, misandry,
   misanthropy, misogyny, mortal horror, mutinousness, nausea,
   negativeness, nolition, nonconformity, noncooperation, obstinacy,
   odium, oppositeness, opposition, opposure, oppugnance, oppugnancy,
   peeve, perfunctoriness, perverseness, perversity, pet peeve,
   phobia, polarity, quarrelsomeness, race hatred, racism, rancor,
   reaction, recalcitrance, recalcitrancy, recoil, refractoriness,
   refusal, reluctance, renitence, renitency, repellency,
   repercussion, repugnance, repulsion, resistance, revolt, rivalry,
   showdown, shuddering, slowness, spite, spitefulness, stubbornness,
   sulk, sulkiness, sulks, sullenness, swimming upstream,
   uncooperativeness, unenthusiasm, unwillingness, vials of hate,
   vials of wrath, vying, xenophobia



The Devil's Dictionary (1881-1906):

ANTIPATHY, n.  The sentiment inspired by one's friend's friend.