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.
petrale peytral petrel petrol peytrel pterylae patrol poitrel pteryla
petrale laetrile citral retral lateral trial atrial butyral futural guttural trawl literal trail litoral littoral mitral natural neutral nitrile peytral retrial sutural