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.
stearate striate start saturate strait strata strati stared strette steered citrate starred striata seatrout stereoed strut sturt street steroid stretta stretti stretto hysteroid stored stride strode stroud sturdy
stearate literate deuterate striate saturate reiterate rehydrate patriate outrate nitrate moderate deaerate quadrate derate quadrat iterate federate butyrate hydrate citrate maturate dehydrate titrate
star satara sitar stair stare starry steer stere stereo aster asteria ester