Ex rhymes with:
aix, atx, beck's, becks, blech's, caltex, checks, cmx, convex, czechs, dec's, decks, dex, eckes, execs, fedex, 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.
Ex sounds like:
e's, each, eachus, eakes, easco, ease, eases, eash, easy, easy's, eaux, echo, echo's, echoes, echohawk, echohawk's, echos, eck, eckes, eco, eeg, ege, egg, egge, eggs, ego, egos, eich, eick, eiichi, eiji, eike, eis, eisa, eisai, eishi, ek, eka, ekco, eke, ekeus, ekk, eko, eos, eos's, es, esau, esch, esche, eschew, eschews, esco, escoe, escue, esh, eskew, eskey, esque, ess, essa, essay, essays, esse, esses, essex, essex's, essick, essie, essig, esso, ewes, ewig, excess, excesses, excise, excises, exco, excoa, excuse, excuses, exec, execs, exes, eye's, eyes, eyes', ezoe, ezzo