There are 17 7-letter words that start with 'ther'.
| therapy | thereat | thereby | therein |
| thereof | thereon | thereto | theriac |
| therian | thermae | thermal | thermel |
| thermes | thermic | thermit | thermos |
| theroid | |||
Note: These 17 7-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)