There are 17 words that start with 'sulfon'.
| sulfone | sulfones | 
| sulfonic | sulfonyl | 
| sulfonate | sulfonium | 
| sulfonyls | sulfonated | 
| sulfonates | sulfoniums | 
| sulfonamide | sulfonating | 
| sulfonation | sulfonamides | 
| sulfonations | sulfonylurea | 
| sulfonylureas | |
Note: These 17 words that start with 'sulfon' are found from the USA & Canada version of the tournament Scrabble word list.