Quach rhymes with:
swatch, watch, boche, botch, crotch, gotch, gotsch, gottsch, knoche, kotch, laatsch, lauch, notch, poche, racz, scotch, swatch, tkacz, tracz, troche, watch
Quach sounds like:
q, q's, q., q.'s, q.s, qawi, qi, qiao, qu, qua, quack, quacks, quai, quake, quake's, quakes, quash, quasi, quassia, quay, quaye, que, queasy, queau, quechee, quek, ques, queue, queues, qui, quiche, quick, quickie, quigg, quik, quiz, quizzes, quo