The word "most fulgurating" is a very strong expression that refers to something that is extremely intense, sudden, and dazzling. Some common synonyms for this word include "explosive," "blazing," "incandescent," "radiant," "fiery," "flashing," "glaring," "bright," "vibrant," and "flamboyant." These words all convey a sense of power, energy, and brilliance, and they can be used to describe anything from a lightning storm to a high-energy performance. Whether you're looking to add some drama to your writing or simply want to express yourself more vividly, these synonyms for "most fulgurating" offer plenty of options to choose from.