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