Spark :  (noun)
1: a momentary flash of light [syn: flicker, glint]
2: brightness and animation of countenance; "he had a sparkle in his eye" [syn: sparkle, light]
3: electrical conduction through a gas in an applied electric field [syn: discharge, arc, electric arc, electric discharge]
4: a small but noticeable trace of some quality that might become stronger; "a spark of interest"; "a spark of decency" ... ( more )

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AC arc, Beau Brummel, Poulsen arc, abettor, activate, actuate, actuator, address, animate, animator, aperiodic discharge, arc, arc column, arc discharge, atom, bake, be in heat, beau, begin, blade, blaze, blink, blinking, blood, bloom, boil, boulevardier, bring about, broil, brush discharge, bud, burn, cajoler, cast, chase, choke, clotheshorse, coax, coaxer, combust, compel, cook, coruscate, coruscation, court, coxcomb, dandy, dash, discharge, disruptive discharge, dude, electric discharge, electric shock, electric spark, electrify, electrodeless discharge, embryo, encourager, energize, energizer, enkindle, esquire, excite, exquisite, fashion plate, fine gentleman, fire, firefly, firer, flame, flame up, flare, flare up, flicker, flush, follow, fop, force, foster, fribble, fry, gadfly, gallant, galvanic shock, galvanize, galvanizer, gasp, germ, gleam, glimmer, glimmering, glint, glisk, glisten, glister, glitter, glittering, glow, glow discharge, glowworm, hint, idea, ignite, impel, impeller, incandesce, inducer, initiate, inspire, inspirer, inspirit, intimation, iota, jack-a-dandy, jackanapes, kindle, lady-killer, lay siege to, lick, light the fuse, look, macaroni, make suit to, make up to, man-about-town, masher, motivate, move, move to action, mover, moving spirit, nucleus, oscillatory discharge, pant, parch, pay attention to, pay court to, persuader, pleader, precipitate, prime mover, promote, prompter, propel, provoke, puppy, pursue, radiate heat, roast, scald, scintilla, scintillate, scintillation, scorch, seethe, serenade, set in motion, set off, shade, shadow, shimmer, shimmer with heat, shimmering, shock, silent discharge, simmer, sip, smack, smattering, smell, smolder, smother, soupcon, spangle, spark gap, spark plug, sparker, sparkle, speck, sport, sprinkling, squire, start up, steam, stew, stifle, stimulate, stimulator, stroboscopic light, sue, suffocate, suggestion, sup, suspicion, swain, sweat, sweetheart, swell, swelter, taste, tempter, thought, tincture, tinge, tinsel, toast, touch, touch off, trace, trigger, twinkle, twinkling, vestige, wheedler, whit, woo, wooer,