"A tooth for a tooth" is an age-old saying that refers to the concept of retaliation or revenge. However, there exist several other phrases and synonyms that depict the same concept of retribution. "Eye for an eye" is perhaps the most common synonym used for "a tooth for a tooth." Other phrases that convey the same meaning are "tit for tat," "reap what you sow," and "what goes around comes around." These proverbs emphasize the consequences of one's actions, whether good or bad. They warn people to be mindful of their behavior because sooner or later, they will face the consequences of their actions. In essence, these phrases stress the importance of justice and fairness in all aspects of life.