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.
plod ploidy plot pled payload poled plied plaid puled paled plead piled pilot plotty pulled polled pleiad pallid peeled pealed pelota pilled pooled palled playday pullout palladia pelt plat palet plait plate platy pleat poult