Writhing rhymes with:
tithing, bathing, breathing, clothing, farthing, mouthing, scathing, sheathing, smoothing, soothing, sunbathing, teething, tithing
Writhing sounds like:
warden's, wardens, wardens', warding, wartimes, weirdness, weirton's, wharton's, wording, worthen's, worthiness, worthing, writedowns, writing, writings