Princeton's WordNet

1. flicker, spark, glint(noun)

   a momentary flash of light

   Synonyms:
   twinkle, waver, sparkle, discharge, flicker, glint, spark, arc, light, flutter, electric discharge, electric arc

2. sparkle, twinkle, spark, light(noun)

   merriment expressed by a brightness or gleam or animation of countenance

   Synonyms:
   illumination, arc, coruscation, lightness, lighting, sparkling, sparkle, light source, flicker, brightness level, igniter, visible light, discharge, electric arc, glister, glitter, spark, brightness, luminosity, lighter, visible radiation, luminousness, scintillation, luminance, light, glint, twinkle, glisten, ignitor, electric discharge

3. discharge, spark, arc, electric arc, electric discharge(noun)

   electrical conduction through a gas in an applied electric field

   Synonyms:
   dismissal, arc, firing, waiver, firing off, dismission, flicker, sack, discharge, venting, liberation, release, bow, sacking, spark, sparkle, run, emission, electric arc, expelling, light, glint, twinkle, outpouring, electric discharge

4. spark(noun)

   a small but noticeable trace of some quality that might become stronger

   Synonyms:
   twinkle, sparkle, discharge, flicker, glint, arc, light, electric discharge, electric arc

5. Spark, Muriel Spark, Dame Muriel Spark, Muriel Sarah Spark(noun)

   Scottish writer of satirical novels (born in 1918)

   Synonyms:
   twinkle, sparkle, discharge, flicker, glint, arc, light, electric discharge, electric arc

6. spark(verb)

   a small fragment of a burning substance thrown out by burning material or by friction

   Synonyms:
   twinkle, sparkle, discharge, flicker, glint, arc, light, electric discharge, electric arc

7. trip, actuate, trigger, activate, set off, spark off, spark, trigger off, touch off(verb)

   put in motion or move to act

   Synonyms:
   jaunt, trip out, start, incite, detonate, offset, get off, motivate, spark, trip up, propel, take off, explode, instigate, trigger off, move, part, trigger, trip, depart, set off, stumble, prompt, turn on, activate, spark off, touch off, blow up, bring out, travel, start out, sparkle, set forth, actuate, stir up, cancel, aerate, set out

8. spark, sparkle(verb)

   emit or produce sparks

   Synonyms:
   scintillate, form bubbles, effervesce, actuate, fizz, sparkle, coruscate, spark off, trip, trigger off, spark, touch off, trigger, froth, activate, foam, set off