Comparative form of flashy: more flashy(adjective)
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Use "flashier" in a sentence
"In summary, if you're starting fresh, and want to have a user interface that is 'flashier' than what you can do right now with Swing, JavaFX is a good choice."
"And they're going to be bigger and flashier and more action-packed."
"He also prided himself on driving a humble Dacia, as opposed to Nicu, the flashier brother, who had a fleet of sports cars."