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.
dartle tartly turtle dirtily tartily tortile dreidl trotyl dreidel tardily treadle treddle tritely toroidal tortilla
hurtle kirtle chortle turtle dartle whortle myrtle courtly mortal rattle curtal partly hartal portly protyle rutile rootle pertly rotl retile artel girdle peartly tartly prattle hurdle cartel curdle curtly fertile brittle aortal quartile portal brattle artal tortile shortly
dart dared dirt dirty dorty drat tart tarty