Quacks rhymes with:
wacks, wax, whacks, antitax, attacks, ax, axe, backes, backs, bax, black's, blacks, blacks', cac's, caq's, chirac's, cracks, dacs, dax, dax', fax, flax, hacks, haq's, jack's, jacks, jaques, knacks, knick-knacks, lac's, lacks, lax, mac's, mack's, macks, macs, max, maxx, neoax, pac's, packs, pacs, pak's, pax, plack's, plaques, plax, pretax, racks, rax, relax, sachs, sachs', sacks, sacs, saks, sax, saxe, shacks, slacks, smacks, snacks, stac's, stacks, tacks, tax, track's, tracks, trax, ty-sachs, vax, wacks, wax, whacks, yax, zack's, zacks
Quacks sounds like:
q, q's, q., q.'s, q.s, qawi, qi, qiao, qu, qua, quach, quack, 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