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.
pirouettes proettes pretties proteus pirates proteas proteose pierrots protease parietes prudes prates parrots pyrites perdues produce pyritous parities parodies purities yperites parts ports prods prats perdus prides parados parodos parties periods peritus parades protozoa priedieus
pirouettes ariettes barrettes burettes curettes pretties proettes syrettes