[1] : The Collaborative International Dictionary of English v.0.48

nauseous \nau"seous\ ?; 277, a. l. nauseosus.
   1. causing, or fitted to cause, nausea; sickening; loathsome;
      disgusting; exciting abhorrence; as, a nauseous drug or
      medicine.
      1913 webster

   2. feeling nausea; as, nauseous from the effects of
      chemotherapy.
      pjc -- nau"seously, adv. -- nau"seousness, n.
      1913 webster

            the nauseousness of such company disgusts a
            reasonable man.                       --dryden.
      1913 webster
see also:
nau"seously nau"seousness 

[2] : WordNet (r) 2.0

nauseous
     adj : causing or able to cause nausea; "a nauseating smell";
           "nauseous offal"; "a sickening stench" syn: nauseating,
            noisome, loathsome, offensive, sickening, vile
see also:
nauseating noisome loathsome offensive sickening vile 

[3] : Moby Thesaurus II by Grady Ward, 1.0

70 moby thesaurus words for "nauseous":
   abhorrent, airsick, anguished, anxious, bad, barfy, bored,
   brackish, carsick, cheerless, cloying, depressed, disgusted,
   disgusting, emetic, fetid, foul, fulsome, grim, high, icky,
   joyless, loathsome, maggoty, mawkish, nasty, nauseant, nauseated,
   nauseating, noisome, noxious, offensive, overripe, pleasureless,
   poisonous, prey to malaise, pukish, puky, qualmish, qualmy, queasy,
   rancid, rank, rebarbative, repelled, repellent, repugnant,
   repulsive, revolted, revolting, rotten, sad, seasick, sickened,
   sickening, spoiled, squeamish, stinking, suffering angst, uneasy,
   unfulfilled, ungratified, unhappy, unpleasant, unquiet,
   unsatisfied, vile, vomity, weevily, yucky

Nauseous >> N Words
Nauseous, definition of term: Nauseous
nauseous_pag1.html