There are 17 8-letter words that start with 'dou'.
| doublers | doublets | doubling | doubloon | 
| doublure | doubters | doubtful | doubting | 
| douceurs | douching | doughboy | doughier | 
| doughnut | doupioni | dourines | dourness | 
| douzeper | |||
Note: These 17 8-letter words that start with 'dou' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with doub, doug, dour, douc, dous, doum, doup, doul, douz, doux.
4-letter words start with 'dou' (3)