Blood feud refers to a long-standing conflict or intense rivalry between two families or groups. However, there are several other synonyms that can be used instead of blood feud. For instance, vendetta, which is a feud resulting from a desire for revenge, revengefulness or resentment, feud, vengeance, animosity, hostility, and enmity. These synonyms depict the intensity of the conflict and the strong emotions involved, often resulting in violence. The term "bitterness" can also be used to imply an intense, long-standing resentment between two parties. Regardless of the word chosen, all of these synonyms convey strong emotions, a history of conflict, and a desire for punishment or revenge.