Sermonise is an activity that involves delivering a speech or lecture in a religious or moral context. It is related to the terms PREACH, DISCOURSE, and ORATE. PREACH is a 6-letter word meaning to deliver a sermon or religious address. DISCOURSE is a 9-letter word meaning to deliver a formal speech or written discussion on a particular topic. ORATE is a 5-letter word meaning to deliver a formal speech in a dignified and eloquent manner. Together, these three words describe the activity of sermonising.