inhumanity

from WordNet (r) 3.0 (2006)

inhumanity
    n 1: the quality of lacking compassion or consideration for
         others [syn: {inhumaneness}, {inhumanity}] [ant:
         {humaneness}]
    2: an act of atrocious cruelty [syn: {atrocity}, {inhumanity}]

from The Collaborative International Dictionary of English v.0.48

Inhumanity \In`hu*man"i*ty\, n.; pl. {Inhumanities}. [L.
   inhumanitas: cf. F. inhumanit['e].]
   The quality or state of being inhuman or inhumane; cruelty;
   barbarity.
   [1913 Webster]

         Man's inhumanity to man
         Makes countless thousands mourn.         --Burns.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

56 Moby Thesaurus words for "inhumanity":
      acuteness, animality, atrociousness, atrocity, barbarity,
      barbarousness, beastliness, bestiality, bloodiness, bloodlust,
      bloodthirst, bloodthirstiness, bloody-mindedness, brutality,
      brutalness, brutishness, cannibalism, cruelness, cruelty,
      destructiveness, extremity, ferociousness, ferocity, fiendishness,
      fierceness, force, furiousness, harshness, impetuosity, inclemency,
      inhumaneness, intensity, malignity, mercilessness, mindlessness,
      murderousness, pitilessness, rigor, roughness, ruthlessness,
      sadism, sadistic cruelty, sanguineousness, savagery, severity,
      sharpness, terrorism, truculence, ungentleness, vandalism,
      vehemence, venom, viciousness, violence, virulence,
      wanton cruelty