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Synonyms for Twinkling (same or very similar meaning)

WordNet sense 1 (a very short time (as the time it takes the eye blink or the heart to beat)):
flash, heartbeat, instant, jiffy, trice, wink, blink of an eye, New York minute, split second

WordNet sense 2 (emitting or reflecting light readily or in large amounts):

From the ODE community, based on WordNetadd/edit