There are 10 words that start with 'hydrot'.
| hydrothorax | hydrotropic |
| hydrotherapy | hydrothermal |
| hydrotropism | hydrothoraces |
| hydrothoraxes | hydrotropisms |
| hydrotherapies | hydrothermally |
Note: These 10 words that start with 'hydrot' are found from the USA & Canada version of the tournament Scrabble word list.