The Collaborative International Dictionary of English v.0.48:

bloodlust \blood"lust\ n.
   a desire for bloodshed.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

bloodlust
    n 1: a desire for bloodshed

Moby Thesaurus II by Grady Ward, 1.0:

56 Moby Thesaurus words for "bloodlust":
   acuteness, animality, atrociousness, atrocity, barbarity,
   barbarousness, beastliness, bestiality, bloodiness, bloodthirst,
   bloodthirstiness, bloody-mindedness, brutality, brutalness,
   brutishness, cannibalism, cruelness, cruelty, destructiveness,
   extremity, ferociousness, ferocity, fiendishness, fierceness,
   force, furiousness, harshness, impetuosity, inclemency,
   inhumaneness, inhumanity, 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