sermon, discourse, preaching

an address of a religious nature (usually delivered during a church service)

• baccalaureate — a farewell sermon to a graduating class at their commencement ceremonies
• kerygma, kerugma — preaching the gospel of Christ in the manner of the early church
• Sermon on the Mount — the first major discourse delivered by Jesus; Matthew 5-7 and Luke 6:20-49
• evangelism — zealous preaching and advocacy of the gospel
• homily, preachment — a sermon on a moral or religious topic

• address, speech — the act of delivering a formal spoken communication to an audience