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.
seat set sat sate suet sati seta sett suety setae satay settee sty sot sit sad stoa suit stew sued site soda cete staw seed stow soot stey sade zeta said stay side sadi stoai suede saute stoae stewy sooty seedy sutta suite
beat eat feat heat meat neat peat seat teat wheat cheat at et