Atomic Mass Unit or AMU is a term that is commonly used in the field of chemistry to describe the mass of atoms. However, there are other synonyms that can be used to describe this term. One of the synonyms is Dalton, which is named after the renowned physicist John Dalton. Another synonym for AMU is unified atomic mass unit or u, which is commonly used in the international system of units. The term MeV/c^2 is also used in particle physics to describe the mass of subatomic particles. Finally, the term u it is also sometimes referred to as the atomic mass constant. Regardless of the word used, each synonym represents a standard unit of measurement used in the study of atomic and subatomic particles.