There are 11 8-letter words that start with 'ther'.
| therefor | theremin | theriaca | theriacs |
| therians | thermals | thermels | thermion |
| thermite | thermits | theropod | |
Note: These 11 8-letter words that start with 'ther' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with therm, there, thera, theri, thero.
5-letter words start with 'ther' (2)