When it comes to describing an atomic chain discharge, there are a few key synonyms that can be useful to know. One alternative term is "plasma chain reaction," which conveys the idea of a chain reaction occurring within a plasma field. Another term that may be used is "electric discharging chain," which emphasizes the electrical nature of the phenomenon. "Electrical arcing chain" is yet another possible synonym, highlighting the arc-like nature of the discharge. Depending on the context and the audience, any of these terms could be used to describe a chain reaction involving atomic particles.