There are 5 13-letter words that start with 'dy'.
| dynamometries | dysfunctional |
| dysmenorrheas | dysmenorrheic |
| dyspeptically | |
Note: These 5 13-letter words that start with 'dy' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with dys, dyn, dye, dya, dyk, dyb, dyi, dyv.
3-letter words start with 'dy' (1)