Fedex rhymes with:
dec's, decks, dex, aix, atx, beck's, becks, blech's, caltex, checks, cmx, convex, czechs, dec's, decks, dex, eckes, ex, execs, flecks, flex, govpx, heck's, hex, jex, lex, meckes, megaplex, mex, necks, nex, nobec's, onex, peck's, perplex, plex, quebec's, rex, sex, sheck's, shek's, specks, specs, tech's, techs, teck's, tex, treks, triplex, vex, wall-tex, wrecks, x, x.
Fedex sounds like:
faddis, faddish, fades, fads, faiths, fates, fatigue, fatigues, fats, fatties, fatuous, fauteux, fayed's, feats, fed's, fedak, feds, feeds, feith's, feitz, fetch, fetches, fetish, fetsch, fetsko, fettes, fettig, fetus, fetuses, fetz, feuds, feutz, fiat's, fides, fifths, fifties, fifty's, fitak, fitch, fites, fits, fitts, fitz, fitzco, fitzhugh, food's, foods, foods', foodways, footage, foote's, fotis, foutch, fouts, foutz, fudge, fudgy, futch