Isotones are atoms with the same number of neutrons but different numbers of protons. Some synonyms for isotone include nuclide, isobar, or isotope. While these terms may be used interchangeably, they each hold a slightly different connotation. For example, an isotope refers to atoms with the same number of protons but different numbers of neutrons, while an isobar refers to atoms with the same mass number but different numbers of protons and neutrons. Nuclide, on the other hand, refers to any stable or unstable atom regardless of its isotones. Overall, while the terms may have subtle differences, they all relate to the unique characteristics of atomic structures.