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.
testy test tasty testa toasty testee testae tost doest deist toast dusty tacet tasset teased dost dust doughiest
zesty testy pesty chesty sty jest geest misty besot pasty gest stey beset suety doughiest ghosty nest hygeist lest hasty vest quest stay hygieist tasty yeast hest gaseity west toasty resit testa piosity deist resat pesto nasty wristy russety beast wrest cesti busty neist fusty gusty cuesta least dusty doest guest zest musty siesta vesta zooiest reset lusty feist fest geste feast gooiest society rest cesta wriest rusty feisty nicety test east best vasty pest heist fiesta reest weest chest shiest yeasty
teas tease tees tews ties toes ates teats teds tets utes