There are 10 words that start with 'repop'.
| repopulate | repopulated | 
| repopulates | repopularize | 
| repopulating | repopulation | 
| repopularized | repopularizes | 
| repopulations | repopularizing | 
Note: These 10 words that start with 'repop' are found from the USA & Canada version of the tournament Scrabble word list.