One syllable words that rhyme with knick-knacks
acts, ax, axe, backes, backs, bax, black's, blacks, blacks', cac's, caq's, cracks, dacs, dax, dax', facts, fax, flax, hacks, haq's, jack's, jacks, jaques, knacks, lac's, lacks, lax, mac's, mack's, macks, macs, max, maxx, pac's, packs, pacs, pacts, pak's, pax, plack's, plaques, plax, quacks, racks, rax, sachs, sachs', sacks, sacs, saks, sax, saxe, shacks, slacks, smacks, snacks, stac's, stacks, tacks, tax, track's, tracks, trax, vax, wacks, wax, whacks, x., yax, zack's, zacks
Two syllable words that rhyme with knick-knacks
attacks, chirac's, impacts, knick-knacks, pretax, relax