Explosive sounds are loud, sudden noises that can be caused by a variety of sources. The term 'explosive sounds' can refer to anything from the sound of a car backfiring to the sound of a bomb detonating. In this crossword, three words were used to describe explosive sounds: BOOMS (5 letters), whams (5 letters), and crumps (6 letters). BOOMS are deep, low-pitched sounds that can be heard from a distance. Whams are sharp, high-pitched sounds that are usually heard up close. Crumps are short, sharp sounds that are often associated with explosions.