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.
stays satays stoas suttas sots sets sits sayyids suits suets stows sites stews situs seats sadis saids setts sates sades satis zetas sodas soots stoss sties setose setous suites sautes settees suttees sods suds
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
stay sty satay sayyid seta setae staw stey stoa stoae stoai sayst