There are 17 words that start with 'penc'.
| pence | pencel | pencil | 
| pencels | pencils | penchant | 
| penciled | penciler | penchants | 
| pencilers | penciling | pencilled | 
| penciller | pencilings | pencillers | 
| pencilling | pencillings | |
Note: These 17 words that start with 'penc' are found from the USA & Canada version of the tournament Scrabble word list.