Atom Smasher is a term used to describe a particle accelerator, which is a device used to accelerate particles to very high speeds. The term ATOM Smasher is derived from the 4-letter word ATOM and the 12-letter word KILLERDILLER. Particle accelerators are used in a variety of scientific fields, such as physics, chemistry, and biology, to study the structure of matter and the interactions between particles. They are also used in medical applications, such as cancer treatment.