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.
satays stays sates satis seats suttas sautes sayyids sots sits sets sites suits stews suets sadis sades situs sodas stoss stoas stows saids sties soots setts zetas setose setous suites settees suttees
satays stays tas taus days middays taws lotas litas cottas katas taos tass pietas reatas pittas outsay rotas mateys getas suttas ditas tatouays todays whiteys chetahs teas lotahs botas fetas utas zetas tads quotas stoas lyttas betas jotas cuteys heydays tats etas cheetahs iotas biotas pitas paydays raitas mutase riatas maydays bettas toys shittahs
satay sat sate sati saute seat seta setae staw stay