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.
wheeples whooplas
wheeples pales pipeless repels popples ripples peepuls peplos nopales soupless sepals spiles maples napless couples supplies zipless gapless diploes piles tapeless pleas tipless huipiles topless plies uppiles poles shapeless plews peles applies supples peplus reapplies popeless replies papules peoples nipples soapless sapless spales lipless maypoles capless zeppoles apples cupules dapples hopeless dipoles hoopless tepals hopples tipples hapless topples fipples pules hipless shipless