There are 14 11-letter words that start with 'sul'.
| sulfhydryls | sulfonamide | sulfonating |
| sulfonation | sulfurating | sulfureting |
| sulfuretted | sulfurizing | sulfurously |
| sulkinesses | sulphureous | sulphurised |
| sulphurises | sultanesses | |
Note: These 14 11-letter words that start with 'sul' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with sulf, sulp, sult, sulk, sull, sulc, suld, sulu.
4-letter words start with 'sul' (2)