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

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n. Violent response to an act of harm or perceived injustice.

n. An act of violent response

n. The act of retaliating, or of returning like for like; retribution; now, specifically, the return of evil for evil; e.g., an eye for an eye, a tooth for a tooth.

n. The act of retaliating; the return of like for like; the doing of that to another which he has done to us; especially (now usually), requital of evil; reprisal; revenge.

n. Synonyms Retribution, Reprisal, etc. See revenge.

n. action taken in return for an injury or offense

"Schelling showed that a party can strengthen its position by overtly worsening its own options, that the capability to retaliate can be more useful than the ability to resist an attack, and that uncertain retaliation is more credible and more efficient than certain retaliation."

absolution   

getting even    return    paying back   

law of retaliation   

retaliate    retaliatory   

payback    vengeance    retribution    reprisal   

punishment    retribution    reprisal    requital    return   

Alsatian    Americanization    Appalachian    Balkanization    Christianization   

retribution    reprisal    revenge    aggression    reparation