The Collaborative International Dictionary of English v.0.48:

Cadaver \Ca*da"ver\ (k[.a]*d[a^]"v[~e]r; k[.a]*d[=a]"v[~e]r), n.
   [L., fr cadere to fall.]
   A dead human body; a corpse.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cadaver
    n 1: the dead body of a human being; "the cadaver was intended
         for dissection"; "the end of the police search was the
         discovery of a corpse"; "the murderer confessed that he
         threw the stiff in the river"; "honor comes to bless the
         turf that wraps their clay" [syn: cadaver, corpse,
         stiff, clay, remains]

Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "cadaver":
   ashes, body, bones, carcass, carrion, clay, corpse, corpus delicti,
   crowbait, dead body, dead man, dead person, decedent, dry bones,
   dust, earth, embalmed corpse, food for worms, late lamented,
   mortal remains, mummification, mummy, organic remains, relics,
   reliquiae, remains, skeleton, stiff, tenement of clay, the dead,
   the deceased, the defunct, the departed, the loved one