Repentance is an important aspect of many religions as it signifies the act of acknowledging one's wrongdoings and seeking forgiveness. To express the same idea, there are several synonyms for the word "repent" such as regret, apologize, atone, confess, and penance. Regret and apologize signify a feeling of remorse for one's mistakes and seeking forgiveness for the same. Atonement involves making amends for one's actions to make things right. Confession includes admitting one's mistakes and seeking forgiveness. And finally, penance involves making a sacrifice or enduring hardship to make up for one's mistakes. All these words express the essence of repentance, which is acknowledging one's wrongdoing and seeking forgiveness.