Excommunicative is a word that is not used very often in day-to-day conversations or writing. However, if you find yourself needing to express the concept of exclusion or the act of banning someone from a group or community, there are other words that can be used instead of excommunicative. Some possible synonyms for excommunicative include "ostracizing," "shunning," "ignoring," "disowning," "expelling," and "banishing." Each of these words conveys a slightly different meaning and can be used in different contexts, but they all share the idea of separating someone from a group or community.