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.
pardine pyridine pardon pieridine peritonea partan parton pertain protein preattune proton predawn preteen protean puritan
pardine sordine turdine sourdine nardine sardine pyridine gradin hordein sordino lurdane reordain hirudin pieridine ordain guardian verdin fordone sordini gradine uridine
pardi pardie pard parade pardah pardee pardy pared parity parodoi parody parried perdie sparid