Nonnuclear refers to something that is not related to nuclear energy, weapons or radiation. Some synonyms for nonnuclear include conventional, traditional, non-atomic, non-fissionable, non-radioactive, and non-uranium. Conventional is a synonym that denotes something that is typical or standard. Traditional implies practices or methods that are part of cultures for generations. Non-atomic means something that is not derived from atoms. Non-fissionable refers to materials that are not capable of undergoing nuclear fission. Non-radioactive implies that an item does not emit harmful radiation. Lastly, non-uranium denotes things that do not contain uranium, a chemical element used in nuclear power plants. These synonyms accurately describe things that have no association with nuclear materials.