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.
proteose protease proteus proteas proettes prates parrots pirates pyrites parodos pirouettes parties parities purities parietes yperites protozoa parodies pierrots pretties ports prats parts prods prides prudes periods parades peritus produce perdues parados paradise pyritous priedieus pards perdus purdas
proteose virtuose courteous keratose protease tortoise