THESAURUS
Writhe
ache, agonize, ail, anguish, bend, blanch, bleed, blench, buckle, contort, crook, crumple, distort, feel pain, feel the pangs, fidget, flinch, flip out, flutter, freak out on, get high on, glow, gnarl, go hard with, go pitapat, grimace, have a misery, have the fidgets, have the shakes, heave, hurt, jerk, knot, palpitate, pant, pound, quake, quaver, quiver, recoil, screw, shake, shiver, shoot, shrink, smart, spring, squiggle, squirm, suffer, suffer anguish, swell, swell with emotion, thrash, thrill, thrill to, throb, tingle, tingle with excitement, toss, toss and turn, tremble, tumble, turn, turn awry, turn on to, twinge, twist, twist and turn, twitch, twitter, wag, waggle, warp, wiggle, wince, worm, wrench, wrest, wriggle, wring
ROGET THESAURUS
Writhe
Distortion
VB
distort, contort, twist, warp, wrest, writhe, make faces, deform, misshape.
Agitation
VB
be agitated, shake, tremble, tremble like an aspen leaf, quiver, quaver, quake, shiver, twitter, twire, writhe, toss, shuffle, tumble, stagger, bob, reel, sway, wag, waggle, wriggle, wriggle like an eel, dance, stumble, shamble, flounder, totter, flounce, flop, curvet, prance, cavort, squirm, throb, pulsate, beat, palpitate, go pitapat, flutter, flitter, flicker, bicker, bustle, ferment, effervesce, foam, boil, boil over, bubble up, simmer, toss about, jump about, jump like a parched pea, shake like an aspen leaf, shake to its center, shake to its foundations, be the sport of the winds and waves, reel to and fro like a drunken man, move from post to pillar and from pillar to post, drive from post to pillar and from pillar to post, keep between hawk and buzzard, agitate, shake, convulse, toss, tumble, bandy, wield, brandish, flap, flourish, whisk, jerk, hitch, jolt, jog, joggle, jostle, buffet, hustle, disturb, stir, shake up, churn, jounce, wallop, whip, vellicate.
Physical Pain
VB
feel pain, experience pain, suffer pain, undergo pain, suffer, ache, smart, bleed, tingle, shoot, twinge, twitch, lancinate, writhe, wince, make a wry face, sit on thorns, sit on pins and needles, give pain, inflict pain, lacerate, pain, hurt, chafe, sting, bite, gnaw, gripe, pinch, tweak, grate, gall, fret, prick, pierce, wring, convulse, torment, torture, rack, agonize, crucify, cruciate, excruciate, break on the wheel, put to the rack, flog, grate on the ear.