There are 11 7-letter words that start with 'hyd'.
| hydatid | hydrant | hydrase | hydrate | 
| hydriae | hydride | hydrids | hydroid | 
| hydrops | hydrous | hydroxy | |
Note: These 11 7-letter words that start with 'hyd' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with hydr, hyda.
5-letter words start with 'hyd' (2)