homily vs. sermon

a sermon, usually on a Biblical topic and usually of a nondoctrinal nature.

an admonitory or moralizing discourse.

an inspirational saying or cliché.

a discourse for the purpose of religious instruction or exhortation, especially one based on a text of Scripture and delivered by a member of the clergy as part of a religious service.

any serious speech, discourse, or exhortation, especially on a moral issue.

a long, tedious speech.