Homiletics:
Homiletics is the study of the composition and delivery of a religious message such as a sermon, bible study or other type of message. The word comes from the Greek homiletikos (“cordial”), which is itself derived from the Greek word translated as homily (homilia, Strong’s Concordance #G3657) which means “discourse.” Homilia is translated “communications” in the KJV Bible translation of 1Corinthians 15:33, its only occurrence in the New Testament. [The Bible Study Site]
Noted in “After Trump and Moore, some evangelicals are finding their own label too toxic to use,” Julie Zauzmer and Sarah Pulliam Bailey, WaPo:
Johnson and the other students hanging out after homiletics class found themselves discussing the four-part definition of evangelical faith, articulated by historian David Bebbington: obedience to the Bible as the ultimate authority, belief in the sacrifice of Jesus on the cross as the source of salvation, the necessity of a personal “born-again” conversion experience, and work to spread the Gospel.