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.
toreador treader trader tireder treater torrider tartar tarter triter tardier tartier torture trattoria trattorie
toreador reader ardor creator mirador parador treader
torta torte toured tread treat treaty stored