Post-nuptial is a term used to describe an agreement between a couple that is made after their wedding. However, there are other words that can also be used to describe this type of agreement. One of these words is post-marital, which is often used interchangeably with post-nuptial. Another term that can be used is post-wedding, which refers to an agreement made after the wedding. Additionally, the term post-ceremony can also be used to describe an agreement made after the wedding ceremony has taken place. Overall, these synonyms for post-nuptial all refer to legal agreements made between a couple after they have been married.