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.
soda sod stoa stoai soddy stoae sot sat sad sadi sued said stow seed stay side sade sate seta staw seat soot sidh sudd sati satay saute seedy setae sooty suede sutta zooid