bob, bobble, bounce, bump, careen, chatter, coggle, continue, dangle, didder, falter, fluctuate, flutter, have an ague, hustle, jactitate, jar, jog, joggle, jolt, jostle, jounce, jump, librate, lurch, nutate, occur often, oscillate, pendulate, pitch, pulsate, pulse, quake, quaver, quiver, recur, reel, resonate, reverberate, rock, roll, shake, shiver, shock, shudder, swag, sway, swing, throb, toss, tremble, tremor, twitter, vacillate, wag, waggle, wave, waver, wobble