There are 18 words that start with 'hydros'.
| hydros | hydroski |
| hydrosol | hydrosere |
| hydroskis | hydrosols |
| hydrostat | hydroseres |
| hydrosolic | hydrospace |
| hydrostats | hydrospaces |
| hydrosphere | hydrostatic |
| hydrospheres | hydrospheric |
| hydrostatics | hydrostatically |
Note: These 18 words that start with 'hydros' are found from the USA & Canada version of the tournament Scrabble word list.