There are 13 words that start with 'repel'.
| repel | repels | repelled | 
| repeller | repellant | repellent | 
| repellers | repelling | repellants | 
| repellency | repellents | repellently | 
| repellencies | ||
Note: These 13 words that start with 'repel' are found from the USA & Canada version of the tournament Scrabble word list.