There are 11 words that start with 'diazo'.
| diazo | diazole |
| diazoles | diazonium |
| diazotize | diazoniums |
| diazotized | diazotizes |
| diazotizing | diazotization |
| diazotizations | |
Note: These 11 words that start with 'diazo' are found from the USA & Canada version of the tournament Scrabble word list.