There are 10 words that start with 'trepa'.
| trepan | trepang | trepans |
| trepangs | trepanned | trepanner |
| trepanners | trepanning | trepanation |
| trepanations | ||
Note: These 10 words that start with 'trepa' are found from the USA & Canada version of the tournament Scrabble word list.