Synonyms of flashing

1 Syllable
beam, light, bright, neon, blink, spark, gleam, glint, fast, pdq, glow
2 Syllables
aglow, beaming, fasted, dazzle, lucent, glisten, moonlit, brightest, twinkle, spangle, twinkling, glare, fulgent, reflect, well-lit, fastest, lighted, fulgid, glance, sparkle, lighter, glimmer, lightest, blaze, shine, flame, glitter, mantling, brighter, chatoyant, chop-chop, flare, faster
3 Syllables
overnight, coruscant, radiate, auroral, fluorescent, scintillant, well-lighted, relucent, bedazzle, irradiant, double-time, screamin', meteoric
4 Syllables
hypersonic, phosphoresce, coruscate, unobscured, scintillating, incandesce, scintillate, momentary
5 Syllables
exhibitionism