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.
beepers boppers biparous
beepers cheepers lepers keepers weepers jeepers peepers sippers piers speirs hopers spears capers whoopers boppers coappears appears copers rapiers cuppers reappears wrappers peppers peers moppers speers nippers peris repros soapers dippers yaupers shoppers shapers chippers suppers uppers topers tappers dupers whappers mappers zippers wipers poppers japers papers sappers cappers apers paupers gapers heapers hoppers vipers reapers perse coppers loppers quippers zappers pears supers nappers knappers mopers gyppers coopers lappers lopers lippers kippers hypers copperas spiers gippers ropers gawpers copiers peres loopers hoopers diapers operas dopers rapers leapers tippers tapers toppers rippers whippers whoppers pipers rappers choppers shippers yappers yawpers