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.
pleater plater plaiter platier platter pleader palter pelter poulter politer plotter plottier polluter palliator paltry peltry polder plodder poultry pellitory
bleater pleater blatter elater falter flatter fleeter floater bloater floatier coleader halter kelter muleteer pelter later relater salter slatier zoolater welter gleetier plater billeter gauleiter platter belter pleader platier plaiter palter alter gloater melter clatter violater latter leader letter realter reletter slater sleetier dilater shelter
pleat plat palate paleate palet palette pileate plait plate plateau platy plead pleiad splat