Atom smashing refers to the process of breaking down atoms into smaller particles through nuclear reactions. There are several synonyms for this term, each with different connotations. "Nuclear fission" is a common term used to describe the process of splitting atomic nuclei into smaller fragments, releasing energy in the process. "Particle acceleration" refers to the process of speeding up subatomic particles to high energies, often using powerful magnets. "Nuclear decontamination" refers to the process of removing radioactive materials from a contaminated environment through various methods. "Nuclear dismantling" refers to the taking apart of a nuclear facility or weapon. Each term describes a different facet of atom smashing and contributes to our understanding of this complex process.