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.
soudan soutane sedan sudden sodden stun satin seton stain stone stony stane sadden sateen satiny seitan stoney
soudan dan dawn dean boudin voudon louden median radian redan sedan udon hyoidean
sod soda soddy sudd sued suede soused