There are 15 words that start with 'rera'.
| reran | rerack | reracks | 
| reraise | reracked | reraised | 
| reraises | reracking | reradiate | 
| reraising | reradiated | reradiates | 
| reradiating | reradiation | reradiations | 
Note: These 15 words that start with 'rera' are found from the USA & Canada version of the tournament Scrabble word list.