[1] : WordNet (r) 2.0

kayo
     v : knock unconscious or senseless; "the boxing champion knocked
         out his opponent in a few seconds" syn: knock cold, knock
         out
see also:
knock cold knock out 

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

127 moby thesaurus words for "kayo":
   cadmean victory, ko, pyrrhic victory, anesthetize, ascendancy,
   bedaze, benumb, besot, blackout, blunt, call off, cancel,
   catalepsy, catatonia, catatony, championship, chloroform, clincher,
   coldcock, coma, complete, conquest, cook, crusher, deaden,
   death stroke, deathblow, defeat, delete, desensitize, dish,
   dispose of, do for, do in, dope, drop the curtain, drug, dull,
   easy victory, end off, end-all, ender, etherize, expunge,
   extinguish, faint, final stroke, finalize, finish, finisher,
   finishing stroke, fix, fold up, freeze, get it over, get over with,
   get through with, give the quietus, grand slam, grayout,
   kayo punch, kibosh, kill, knock out, knock senseless, knock stiff,
   knock unconscious, knockout, knockout blow, landslide,
   landslide victory, last dab, lay out, lipothymia, lipothymy,
   mastery, moral victory, narcotize, nirvana, nirvana principle,
   nothingness, numb, oblivion, obliviousness, obtund, palsy,
   paralyze, perfect, picnic, polish off, pushover, put paid to,
   put to sleep, quietus, runaway victory, scrag, scuttle,
   semiconsciousness, senselessness, settle, settler, shoot down,
   sink, sleep, sockdolager, stopper, stun, stupefy, stupor, subdual,
   subduing, success, swoon, syncope, torpedo, total victory, triumph,
   unconsciousness, undo, victory, walkaway, walkover, win, winning,
   winning streak, wipe out, zap

Kayo >> K Words
Kayo, definition of term: Kayo
kayo_pag1.html