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.
waist wast wist waste whist west wost weest wised wissed wayside
maist waist visit mayst caste gast joist nasty misty vast oast hygeist haste pasty heist pasta feisty wrist roast wist doughiest yeast shiest cist vista zooiest ghast foist waste vasty taste toast kist fist bast hoist paste least tacit hasty hygieist gist past moist cast gooiest last coast mist list baste feist piste hist mast neist wast toasty east tasty feast fast wriest deist whist sayst boast wristy beast chaste shist hast yeasty
was wis waes waws ways wise wiss ywis iwis swiss twas