Excommunicates is a word that is used to refer to the act of officially expelling someone from a church or religious community. There are several synonyms that can be used to describe this action, depending on the context and the severity of the situation. Some of these synonyms include ostracize, banish, exiled, blacklisted and cast out. Each of these words has a similar meaning, but they may have slightly different connotations. For example, ostracize implies being excluded from a group, while banish refers to being sent away or forced to leave. Regardless of the word used, being excommunicated can be a traumatic experience for those who experience it.