There are 17 words that start with 'cancel'.
| cancel | cancels | 
| canceled | canceler | 
| cancelers | canceling | 
| cancelled | canceller | 
| cancelable | cancellers | 
| cancelling | cancellous | 
| cancelation | cancellable | 
| cancelations | cancellation | 
| cancellations | |
Note: These 17 words that start with 'cancel' are found from the USA & Canada version of the tournament Scrabble word list.