The word "Sermonic" is primarily used to describe something that relates to or resembles a sermon. However, there are several other synonyms for this word that can be used interchangeably. One possible option is "preachy," which refers to something that is overly moralistic or didactic. Another synonym is "pontifical," which connotes a sense of self-importance or arrogance in speech. "Homiletic" is another option, which describes something that is related to the art of preaching or delivering sermons. Lastly, "proselytizing" can also be used as a synonym for sermonic, particularly when discussing persuasive or evangelical rhetoric. Overall, there are many ways to describe the style and tone of a sermon beyond just the term "sermonic".