nock, tremble, bow, arrows, tingle, sneer, flail, twitch, howl, recoil, fletching, sharpening, lances, pointy, palpitate, fangs, shiver, crosshairs, zap, scabbards, clonk, shriek, talon, startle, prickle, jowls, bludgeon, twinkle, daggers, snivel, cluck, cocking, whimpers, braying, blunderbuss, palps, gabble, buckler, glint, rattling, cackles, chortle, flexing, muzzle, hissing, murmur, quaver, growl, throb, burr, gooseflesh, plink, zing, quivery, gnawing, scream, impassivity, sears, whoosh, fibrillating, glower, beady, grumbly, pitchforks, picador, gorgons, sabers, waggles, gonads, clench, bawl, slings, cower, lever, squeal, crick, protectors, rapier, jugular, ache, shrilling, claws, wince, buggy whip, solar plexus, scrunch, tickle, whetstone, shudder, whinnies, wag, gatling gun, tuchus, apple polisher, bristling, rasps, cringe, appendage, serrations, throttle, bowstring, flicker, bump, puff, quivers, rattle, ripple, whiff, flash, shadow, flutter, gleam, ruffle, sound, splash, tingling, incense, jewel, myrrh, sandal, spear, axe, axle, berry, betel, cigar, coffee, comb, dispatch, flame, gun, litter, pod, poison, pouch, rain

tremolo

vibrate

case, fear, fearfulness, fright, motion, move, movement, move back and forth

chill, flitter, frisson, palpitation, quake, quivering, shakiness, shaking, thrill, trembling, tremor, vibration, waver