This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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• Wordscraper
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n. One who executes, especially one who puts a condemned person to death.

n. An official person who carries out the capital punishment of a criminal.

n. executor

n. One who executes; an executer.

n. One who puts to death in conformity to legal warrant, as a hangman.

n. One who executes or carries into effect; especially, one who carries into effect a death sentence of a court or tribunal; a functionary who inflicts capital punishment in pursuance of a legal warrant; a headsman or hangman.

n. That by means of which anything is performed; an instrument or implement used in producing a desired effect.

n. an official who inflicts capital punishment in pursuit of a warrant

"They'll get – whoever the executioner is – a soldier, a relative of someone who was killed in 9/11, and a frequent flyer."

killer    slayer   

execute    electrocutioner    executor    execution   

headman    electrocutioner    headsman    hangman   

executer    killer    deathsman    headsman    hangman    carnifix    lictor    jack ketch    tormentor    slaughterman   

hangman    headsman    prosecutor    woodman    juror    assassin    slayer    sheriff    coroner    animator