Yack rhymes with:
yak, aback, ack, adak, akc, attack, back, backe, bak, bakke, beaulac, black, brac, brack, brakke, braque, cac, caq, chirac, clack, crack, dac, dack, dak, dulac, fac, flack, flak, hack, hacke, haq, haque, jac, jack, knack, knick-knack, krack, kracke, kwak, lac, lack, lak, mac, mack, macke, mak, nack, nacke, pac, pack, pak, paque, plack, placke, plaque, post-attack, ptak, quack, rack, rak, repack, sac, sack, sak, schack, schlack, schnack, schrack, shack, shaq, slack, smack, snack, spack, spak, stac, stack, strack, stracke, tac, tack, tacke, tak, trac, track, trak, unpack, vanvlack, wack, whack, wrack, yak, zach, zack, zak
Yack sounds like:
y's, y.'s, yacko, yacos, yagi, yahoos, yak, yake, yakusa, yass, yasso, yasuhiko, yasuo, yasushi, yasuyoshi, yauch, yax, yazzie, yeakey, yeas, yeck, yeosock, yes, yeses, yeske, yessuey, yew's, yikes, yoak, yockey, yoes, yoga, yogi, yoichi, yoke, yokes, yokich, yoko, yokokohji, yoos, yoshi, yoshiaki, yoshihashi, yoshihisa, yoshikawa, yoshikazu, yoshio, yoshioka, yoss, yossi, yous, youse, yoyos, yu's, yucca, yuck, yucky, yugo, yugo's, yugos, yuhas, yuhasz, yuichi, yuk, yukio, yuko, yuks, yusko