Prefixes:
* Pre-sermon: This could refer to something that happens before the sermon, like a pre-sermon announcement or a pre-sermon prayer.
* Anti-sermon: This could refer to something that opposes or goes against the teachings of a sermon.
Suffixes:
* -like: You could use "sermon-like" to describe something that resembles a sermon in style or content.
It's important to note that these are not standard words, but rather examples of how you could potentially create new words using the base "sermon".
Alternatively, you could consider using other words related to sermons:
* Homily: A religious discourse, especially one given during a church service.
* Preaching: The act of delivering a sermon.
* Discourse: A formal discussion or lecture.
* Address: A formal speech.
The best option for you will depend on the specific context you are writing in.