"Most sermonic" can be described as a style of speech or writing that is preachy, moralistic, or designed to instruct or persuade in a religious or spiritual context. Synonyms for this term include preachy, moralizing, didactic, homiletic, evangelical, pulpit-style, pontifical, and catechistic. These words all describe a tone or approach to communication that is aimed at changing someone's beliefs or behavior by appealing to their sense of morality or spirituality. Whether writing a sermon, giving a speech, or delivering a lecture, using these synonyms will help communicate your message in a way that is both persuasive and compelling.