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.
pieridine pyridine pardine peritonea pertain pardon predawn protein puritan preattune hypertonia
pyridine pieridine uridine viridian gradine meridian nardine pardine sardine sordine sourdine turdine