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.
setts sets settees suets seats suttas setous setose sits suttees sots stoas zetas cetes stews soots stows sades suits satis stays situs sates sites seeds sides sties stoss satays sautes suedes suites soddies sods suds zits
netts setts yetts mitts pottos leets meets mottes gets quietus keets hets jets beats pets beets neats cetes motts fouettes bets haets metis lottes buttes sets matts tuttis yetis suets sheets cheats ottos wheats weets deets tots betas pittas tats tets fetus dittos rets zetas bettas bitts lyttas lottos seats rottes fets cottas mottos heats fetas butts foetus vets mattes suttas meats fyttes lattes newts nets quiets fetes metes mutts feats shotts getas duets ghettos batts botts peats putts poets dattos lets pietas chotts tits eats teats tuts watts diets wets whets etas jetes
sett settee set seat seta setae suet suety sutta suttee