Knox's rhymes with:
cox's, outfoxes, sox's, affixes, alex's, alexs, amax's, amex's, annexes, apex's, appendixes, avtex's, axes, banks's, boomboxes, brooks's, cevaxs, cineplex's, climaxes, coaxes, comex's, cox's, crucifixes, cyrix's, dax's, dynamics's, endotronics's, essex's, exes, faxes, felix's, fixes, flexes, gearboxes, genex's, hoaxes, imax's, index's, indexes, ionics's, isomedix's, jukeboxes, lynxes, mailboxes, marks's, matchboxes, matrix's, matrixes, max's, metroplexes, miramax's, nixes, nynex's, onex's, outfoxes, paradoxes, patlex's, perplexes, phoenix's, relaxes, royex's, sachs's, saks's, six's, sixes, skyboxes, sox's, speakes's, spinks's, surtaxes, syntex's, tax's, taxes', telex's, telmex's, vaxes, waxes, wickes's, x's, x.'s, x.s, xerox's, xeroxes
Knox's sounds like:
kaczynski, kaczynski's, kagins, kahan's, kahn's, kahng, kainz, kamakau, kamakau's, kamehameha's, kamens, kamensky, kamikaze, kamins, kaminski, kaminsky, kamke, kanagy, kanak, kanazawa, kane's, kaneko, kang, kangas, kanghua, kangyo, kaniewski, kanis, kanji, kanka, kankakee, kankaku, kanouse, kansai, kansas, kansas', kansas's, kanz, kanzi, kaohsiung, kasinga, kasinga's, kassing, kaunakakai, kayaking, kean's, keimig, kemmons, ken's, kenagy, kenichi, kenji, kennesaw, kenning, kenosha, kenya's, kenyans, kenzie, kenzo, kessenich, keying, keynes, kganakga, khan's, khomeini's, kicking, kieschnick, kiggins, kim's, kimche, kimchee, kimchi, kimco, kimes, kimmich, kimmins, kimmons, kimonos, kims, kimsey, kimzey, kin's, kinch, kincy, kines, king, king's, kings, kings', kingsey, kingsway, kinko, kinko's, kinks, kinky, kinnick, kinnock, kinnock's, kinsey, kinshasa, kinzey, kinzie, kissing, kiwanis, kmiec, kmiecik, knaack, knaak, knack, knacks, knaggs, knaus, knauss, kneece, kneeing, knees, kness, knick, knicks, knicks', knies, kniess, knigge, kniss, knoch, knoche, knock, knocks, knogo, knoke, knous, knouse, knowing, knowns, knows, knox, kochanek, kochanowski, kochanski, kocinski, koenig, koenigs, kohnke, kokan's, komag, komansky, kominek, konaga, kong, kong's, konica, konicek, konicki, konieczka, konig, koning, konishi, konwinski, konz, konzi, konzi's, koon's, koonce, koonig, kooning, koons, kosanke, koscinski, kosinski, kosmicki, kouns, kownacki, kozemchak, kozinski, kozminski, kuchinski, kuchinsky, kuchma's, kucinski, kuczynski, kuenzi, kuhnke, kuhns, kumagai, kunce, kunes, kunesh, kung, kunka, kuns, kunz, kunze, kuzminski, kuznicki, kwang, kwangju, kwanza, kwanzaa, kwasniewski, kwasnik, kwiecinski, kwok-shing, kwong, kynikos, kyong, kyoung, kyung