Open English Wordnet
Nouns
(n)sparkle, twinkle, spark, lightmerriment expressed by a brightness or gleam or animation of countenance“he had a sparkle in his eye”,
“there's a perpetual twinkle in his eyes” Verbs
(v)twinkle, winkle, scintillateemit or reflect light in a flickering manner“Does a constellation twinkle more brightly than a single star?”