"Sparkily" is an adverb used to describe something that glitters or shines with sparks or sparkles. Some synonyms that can be used in its place include "sparklingly," which is the more commonly used term, and "twinklingly," which conveys a softer, more gentle glow. Other possible synonyms are "scintillatingly" and "gleamingly," which both suggest a bright and vivid shine. "Radiantly" and "luminously" are also possible alternatives, with the former emphasizing a strong and glowing light while the latter is more focused on an overall brightness that illuminates the surroundings.