There are none
A 9 letter word from those letters is Galumphed which means to move along heavily and/or clumsily.
auctioned?
Iam Dogsfoods IAM Dogsfood
Using all the letters in one word, Nothing.
The letters "l" and "d" are silent in the word "could".
You can get the word pyramids from those letters.
Hydrofoil
Darshan and duramen are the seven letters word that start with D and end with N.
I N D E E D= 6 letters
redhead
Including the letters d, b, f, the longest word might be defibrillation.
The word is radius.