There are 5 8-letter words that start with 'therm'.
| thermals | thermels | thermion | thermite |
| thermits | |||
Note: These 5 8-letter words that start with 'therm' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with thermo, thermi, therma, therme, therms.
6-letter words start with 'therm' (2)