There are 14 words that start with 'diabo'.
| diabolo | diabolic |
| diabolos | diabolism |
| diabolist | diabolize |
| diabolical | diabolisms |
| diabolists | diabolized |
| diabolizes | diabolizing |
| diabolically | diabolicalness |
Note: These 14 words that start with 'diabo' are found from the USA & Canada version of the tournament Scrabble word list.