There are 9 words that start with 'downh'.
| downhaul | downhill | 
| downhauls | downhills | 
| downhiller | downhearted | 
| downhillers | downheartedly | 
| downheartedness | |
Note: These 9 words that start with 'downh' are found from the USA & Canada version of the tournament Scrabble word list.