There are 11 words that start with 'serm'.
| sermon | sermons | sermonic | 
| sermonize | sermonette | sermonized | 
| sermonizer | sermonizes | sermonettes | 
| sermonizers | sermonizing | |
Note: These 11 words that start with 'serm' are found from the USA & Canada version of the tournament Scrabble word list.