One syllable words that rhyme with relax
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 relax
attacks, chirac's, impacts, knick-knacks, pretax, relax