homiletics
The art of preaching (especially the application of rhetoric in theology).
uncountable
We will consider first what is common to Rhetoric and Homiletics, then what is special to the latter. Rhetoric is the genus, Homiletics the species.
Where it comes from
From Ancient Greek ὁμιλητική (homilētikḗ). Compare ὅμιλος (hómilos, “crowd, throng”), ὁμῑλέω (homīléō, “to be with, to talk”), and ομιλώ (omilṓ, “to talk”).
Adapted from the Wiktionary entry homiletics (CC BY-SA 4.0).