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.
pirogi pierogi parge porgy purge peerage perigee parridge porridge porridgy
pierogi pirogi ragi corgi tragi choragi choregi
pro pair pier prao proa prow pyro spiraea spire spirea spiry