There are 14 words that start with 'stuf'.
| stuff | stuffs | stuffy | 
| stuffed | stuffer | stuffers | 
| stuffier | stuffily | stuffing | 
| stuffiest | stuffings | stuffless | 
| stuffiness | stuffinesses | |
Note: These 14 words that start with 'stuf' are found from the USA & Canada version of the tournament Scrabble word list.