21. Ducks and drakes used to bust the dam.
As the previous query by me has got to 15 answers I thought it better to start again rather than let it drift on getting longer.
The answer has to contain a letter(s) that is(are) silent. Of all the answers given only ricochet and bombings really fit that description. I don't think ricochet is right as it doesn't fit the ducks and drakes and stones bouncing off the water. BOMBINGS fits well with ducks and drakes and bust the dam.
Unless a better idea comes up I will go with BOMBINGS and it is a very simple answer!!!!!
Only that it might strengthen the argument that skimmed stones (and bouncing bombs) ricochet rather than bounce. It is just semantics though and you have to just take your pick.