I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
fetus foetus fets feats fetes feuds fetas feds fats vets fits fatuous fuds fouettes foots fiats fatso feeds fates vatus feods fades fyttes footsy vetoes fatties foodies ghettos footies fuddies ghettoes fads fids futz vats
fetus quietus foetus meats beats coitus battues duteous eats lets taus situs keets beauteous vets hiatus getas betas etuis adieus diets sets jetes tets yetis cheats metis whets wets pets tutus meets seats riotous newts nets zetas piteous heats rets lotus feats beets meatus metes peats netts teats cetes leuds chateaus setous luteous deets suets fetes leets retuse setts gets neats haets weets poets fets feuds etas bets vatus hideous pietas jets sheets gateaus quiets fetas tuis hets duets tuts wheats yetts
fet feat feet feta fete feud feued