Fission is a term used in nuclear physics and chemistry to describe the process of splitting an atomic nucleus into two or more smaller nuclei. There are several synonyms for the word fission which include division, fragmentation, cleavage, separation, and splitting. All these words have a common attribute which is used to describe a process of obtaining smaller parts from a larger entity. Fission is an essential process in nuclear energy generation and is also used in the production of nuclear weapons, making it a highly relevant word for scientists and researchers in the field. Having an understanding of synonyms for fission can help in better expressing the concept in research, scientific papers, and academic publications.