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.
cist cyst cesta cesti cecity cestoi siesta zoisite society cissoid zooiest xyst zest sayst xysti zesty zizit
feist hygieist wist waist cist neist moist mist maist list kist joist hygeist fist gist hoist hist heist foist wrist deist whist shist