There are 12 words that start with 'somna'.
| somnambulant | somnambulate |
| somnambulism | somnambulist |
| somnambulated | somnambulates |
| somnambulisms | somnambulists |
| somnambulating | somnambulation |
| somnambulistic | somnambulations |
Note: These 12 words that start with 'somna' are found from the USA & Canada version of the tournament Scrabble word list.