There are 15 words that start with 'reaf'.
| reaffix | reaffirm | 
| reaffirms | reaffixed | 
| reaffixes | reaffirmed | 
| reaffixing | reafforest | 
| reaffirming | reafforests | 
| reafforested | reaffirmation | 
| reafforesting | reaffirmations | 
| reafforestation | |
Note: These 15 words that start with 'reaf' are found from the USA & Canada version of the tournament Scrabble word list.