There are 16 words that start with 'penal'.
| penal | penally |
| penalty | penalise |
| penality | penalize |
| penalised | penalises |
| penalized | penalizes |
| penalties | penalising |
| penalities | penalizing |
| penalization | penalizations |
Note: These 16 words that start with 'penal' are found from the USA & Canada version of the tournament Scrabble word list.