Doing penance is an act of repentance for one's wrongdoing. It is a form of self-punishment or atonement for committing a sin. There are several synonyms for the term 'do penance' such as 'make amends,' 'seek forgiveness,' 'repent,' 'mend your ways,' 'redress,' 'apologize,' and 'make right.' All of these terms imply that one has committed a wrong and is seeking to make it right. Doing penance is an essential part of many religions and beliefs, and it is considered as a way for individuals to correct their mistakes and improve themselves.