Retaliation

noun

1. 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.
2. Synonyms Retribution, Reprisal, etc. See revenge.
3. 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.
4. Violent response to an act of harm or perceived injustice.
5. An act of violent response