sickening

sickening
    adj 1: causing or able to cause nausea; "a nauseating smell";
           "nauseous offal"; "a sickening stench" [syn:
           {nauseating}, {nauseous}, {noisome}, {queasy},
           {loathsome}, {offensive}, {sickening}, {vile}]
    

Sickening \Sick"en*ing\, a.
   Causing sickness; specif., causing surfeit or disgust;
   nauseating. -- {Sick"en*ing*ly}, adv.
   [1913 Webster]
    

Sicken \Sick"en\, v. t. [imp. & p. p. {Sickened}; p. pr. & vb.
   n. {Sickening}.]
   1. To make sick; to disease.
      [1913 Webster]

            Raise this strength, and sicken that to death.
                                                  --Prior.
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   2. To make qualmish; to nauseate; to disgust; as, to sicken
      the stomach.
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   3. To impair; to weaken. [Obs.] --Shak.
      [1913 Webster]
    

60 Moby Thesaurus words for "sickening":
      abhorrent, abominable, bad, barfy, base, beastly, below contempt,
      beneath contempt, brackish, cloying, contemptible, crude,
      despicable, detestable, disgusting, execrable, fetid, forbidding,
      foul, fulsome, gross, hateful, heinous, high, icky, ignoble,
      loathsome, maggoty, malodorous, mawkish, mephitic, miasmal,
      miasmic, nasty, nauseant, nauseating, nauseous, noisome, noxious,
      objectionable, obnoxious, obscene, odious, offensive, overripe,
      poisonous, rancid, rank, rebarbative, repellent, repugnant,
      repulsive, revolting, rotten, spoiled, stinking, vile, vomity,
      weevily, yucky