Jack's rhymes with:
jacks, jaques, 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, 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, quacks, 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
Jack's sounds like:
j, j's, j., j.'s, ja, jac, jacek, jack, jacka, jackass, jacki, jacki's, jackie, jackie's, jacko, jackowski, jacks, jacky, jacky's, jaco, jacox, jacque, jacques, jacques', jacquez, jacquie, jacuzzi, jae, jae's, jago, jagow, jags, jai, jake, jake's, jakes, jakeway, jakie, jaqua, jaquay, jaques, jaquess, jaquez, jaquish, jas, jasek, jaskiewicz, jasko, jaskowiak, jaso, jass, jasso, jauch, jaw, jaws, jay, jay's, jaya, jaycee, jaycees, jaycox, jaye, jays, jazz, jazzy, je, jech, jee, jees, jeez, jeeze, jeschke, jeske, jess, jesse, jesse's, jessee, jessica, jessica's, jessie, jessy, jessye, jesus, jesus', jew, jewess, jewish, jewkes, jews, jews', jex, jezek, jezewski, jha, ji, jia, jicha, jie, jig, jigs, jigsaw, jo, joao, jock, jockey, jockeys, jocks, jocosa, joe, joe's, joes, joey, joey's, jog, jogs, joh, joice, joie, joke, jokes, joki, joo, joos, jos, jose, jose's, josey, josh, joshi, joshua, josiah, josie, joske's, joss, joswick, joy, joy's, joyce, joyce's, joye, joyous, joys, jozwiak, ju, jua, jue, jug, juge, jugs, juhas, juhasz, juice, juices, juicy, jujo, juju, juke, jukes, juki, jus, jusco