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.
updos uptoss
updos peds teapots spuds speedos rapids pods pots puds apodous apods pads bipods boughpots bowpots cupids keypads lipids mopeds kneepads repots spots depots bipeds