As you may have noticed, above you will find words for "Of the point where the prompt neutrons produced by a nuclear fission chain reaction are just sufficient to sustain the chain reaction on their own, past which changes in reaction power occur on a timeframe of milliseconds, too rapidly for a human operator to control.". Hover the mouse over the word you'd like to know more about to view its definition. Click to find a better fitting word. Finally, thanks to ChatGPT, the overall results have been greatly improved.