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.
sot soot sooty sod sty sat set sit stoa stay seta sate sati seat sett soda suit stey staw site stow stew suet saute stewy suite soddy stoai stoae satay suety sutta setae zooty settee suttee