There are 21 words that start with 'stun'.
| stun | stung | 
| stunk | stuns | 
| stunt | stunts | 
| stunned | stunner | 
| stunted | stunners | 
| stunning | stunsail | 
| stunting | stuntman | 
| stuntmen | stunsails | 
| stunningly | stuntwoman | 
| stuntwomen | stuntedness | 
| stuntednesses | |
Note: These 21 words that start with 'stun' are found from the USA & Canada version of the tournament Scrabble word list.