spark

nouns

a momentary flash of light
flicker, glint, spark
merriment 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"
light, spark, sparkle, twinkle
electrical conduction through a gas in an applied electric field
arc, discharge, electric arc, electric discharge, spark
a small but noticeable trace of some quality that might become stronger
"a spark of interest"; "a spark of decency"
spark
is a type of (narrower)
a just detectable amount
"he speaks French with a trace of an accent"
hint, suggestion, trace
a small fragment of a burning substance thrown out by burning material or by friction
spark
is a type of (narrower)
a piece broken off or cut off of something else
"a fragment of rock"
fragment

verbs

put in motion or move to act
"trigger a reaction"; "actuate the circuits"
activate, actuate, set off, spark, spark off, touch off, trigger, trigger off, trip
emit or produce sparks
"A high tension wire, brought down by a storm, can continue to spark"
spark, sparkle