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.
pyritous peritus pyrites periods proteus purities yperites parietes parities proteose prods parts ports prats priedieus prates perdus prides prudes pirouettes parados parties proteas perdues parrots parodos produce pirates paradise pierrots pretties proettes protease protozoa parodies pards purdas
pyritous riotous burritos virtuous virtus courteous peritus tortuous
pyrite parity periti purity sprit sprite