Synonyms and related words :
agitate, bob, bobble, bounce, bump, didder, dither, falter, fidget, flick, flip, flirt, flounce, grimace, have the fidgets, hitch, itch, jar, jerk, jig, jigger, jigget, jog, joggle, jolt, jostle, pluck, quake, quaver, quiver, rictus, shake, shiver, shock, shudder, snake, snatch, start, sudden pull, tic, tremble, tremor, tweak, twitch, twitter, vellicate, wiggle, wobble, wrench, wriggle, yank, yerk