Nuclear fission power is a complex and technical term that refers to the process of producing energy through the splitting of an atom's nucleus. Synonyms for this term can be useful for those looking to replace it with a simpler or more accessible alternative. Some possible synonyms include nuclear energy, atomic power, nuclear splitting, reactor power, and nuclear electricity. It's important to note, however, that the use of these synonyms should still convey the same technical meaning and accuracy as the original term. It's also important to consider the context in which these synonyms are being used, as each may have different connotations and implications.