There are 17 words that start with 'steal'.
| steal | steals | 
| stealer | stealth | 
| stealage | stealers | 
| stealing | stealths | 
| stealthy | stealable | 
| stealages | stealings | 
| stealthier | stealthily | 
| stealthiest | stealthiness | 
| stealthinesses | |
Note: These 17 words that start with 'steal' are found from the USA & Canada version of the tournament Scrabble word list.