dear. if you say something is dear you mean it is expensive.
Doping is a word beginning with D meaning taking drugs to increase performance.
diggers
DORAG
dander
daybreak
* demise
duchess dame
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.
ditto. door. drain.
akjkiod