Flexed rhymes with:
perplexed, hext, kekst, next, perplexed, sexed, teletext, text, vexed, affixed, akst, angst, anikst, annexed, axed, axt, bakst, baxt, betwixt, blixt, boxed, climaxed, coaxed, context, datext, faxed, fixed, flummoxed, hext, hoechst, hypertext, indexed, intermixed, kekst, maxed, mixed, mixte, next, nixed, outfoxed, overtaxed, perplexed, pretext, relaxed, sexed, sixed, subtext, taxed, teletext, text, transfixed, unmixed, untaxed, vexed, videotext, waxed, xeroxed
Flexed sounds like:
falgoust, falgout, falsehood, falsetto, falsity, felicetti, felicitate, felicite, felicity, filched, filegate, flaccid, flagday, flagged, flashed, flashiest, flaxseed, fleeced, fleshed, flight, flighty, flocked, fluctuate, fluctuated, flushed, full-sized, fullest