What is another word for splitting the atom?
Pronunciation: [splˈɪtɪŋ ðɪ ˈatəm] (IPA) 
There are a few different phrases that can be used to refer to the process of splitting the atom. One common term is "nuclear fission," which refers specifically to the splitting of a heavy nucleus into two smaller ones. Another term that is sometimes used is "atomic disintegration." Both of these phrases describe the same basic phenomenon, in which the nucleus of an atom is broken apart into smaller pieces. This release of energy is what makes nuclear power possible, though it also has the potential to be extremely dangerous if not properly controlled. Overall, while the phrase "splitting the atom" is certainly the most common way to refer to this process, there are a few alternatives that you may encounter from time to time as well.
