Other than DENIM (a medium flat blue) and DUN (brownish gray horse color), there are none.
Donuts.
dioxin - a potent chemical that causes cancer
drover
dress dungarees (another word for blue jeans) derby hat
Candid?
Doping is a word beginning with D meaning taking drugs to increase performance.
diggers
daybreak
* demise
duchess dame
DORAG
dander
This is not a "D" word but the best word in the whole of scrabble is "Mastery".
Another word for service can be duty.
Another word for translucent is diaphanous.
desert
Debonair?