There are 14 words that start with 'sulfa'.
| sulfa | sulfas |
| sulfate | sulfated |
| sulfates | sulfatase |
| sulfating | sulfation |
| sulfatases | sulfations |
| sulfadiazine | sulfadiazines |
| sulfanilamide | sulfanilamides |
Note: These 14 words that start with 'sulfa' are found from the USA & Canada version of the tournament Scrabble word list.