Retter rhymes with:
fretter, tretter, better, bettor, debtor, detter, etter, fetter, fretter, geter, getter, jetter, ketter, letter, metter, mettur, netter, petr, petre, petter, pipetter, schetter, setter, shetter, stetter, sweater, tretter, tschetter, vetere, vetter, wetter, yetter
Retter sounds like:
radar, radder, rader, radiator, raeder, raether, raider, rater, rather, ratier, ratterree, rattray, reader, readier, redder, reder, redraw, reeder, rehder, reider, reiter, reitera, reither, reitter, reorder, retire, retiree, retro, retry, reuter, reuther, reutter, ridder, rider, rieder, riederer, rioter, riter, ritter, roder, rodier, roeder, roederer, roether, rohwedder, rohweder, rooter, rotary, rother, rothery, rotor, rotter, router, routhier, rudder, ruder, rueter, ruether, ruiter, ruter, ruther, rutter, ryder, ryther, ryutaro