There are 13 words that start with 'desul'.
| desulfur | desulfurs | 
| desultory | desulfured | 
| desulfuring | desulfurize | 
| desultorily | desulfurized | 
| desulfurizes | desulfurizing | 
| desultoriness | desulfurization | 
| desultorinesses | |
Note: These 13 words that start with 'desul' are found from the USA & Canada version of the tournament Scrabble word list.