There are 11 words that start with 'repet'.
| repetend | repetends | 
| repetition | repetitive | 
| repetitions | repetitious | 
| repetitional | repetitively | 
| repetitiously | repetitiveness | 
| repetitiousness | |
Note: These 11 words that start with 'repet' are found from the USA & Canada version of the tournament Scrabble word list.