The Collaborative International Dictionary of English v.0.48:

Hors de combat \Hors` de com`bat"\ [F.]
   Out of the combat; disabled from fighting; out of action.
   [1913 Webster +PJC]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "hors de combat":
   all up with, beat, beaten, bested, confounded, defeated,
   discomfited, done for, done in, down, fallen, fixed, floored,
   lambasted, lathered, licked, obsolete, off the field, on the skids,
   out of commission, out of gear, outdone, overborne, overcome,
   overmastered, overmatched, overpowered, overridden, overthrown,
   overturned, overwhelmed, panicked, put to rout, routed, ruined,
   scattered, settled, silenced, skinned, skinned alive, stampeded,
   trimmed, trounced, undone, upset, whelmed, whipped, worsted