There are 13 words that start with 'sull'.
| sully | sullen | sullage |
| sullied | sullies | sullages |
| sullener | sullenly | sullying |
| sullenest | sulliable | sullenness |
| sullennesses | ||
Note: These 13 words that start with 'sull' are found from the USA & Canada version of the tournament Scrabble word list.