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.
limbless limeless loamless limulus lamellas lamellose
limbless tombless jumbles gambles gumless limeless mumbles nombles humbles rimless rambles tameless timeless fumeless timbales tumbles wambles chimbleys shambles seamless homeless fumbles foamless mealless fimbles fameless bumbles beamless ambles sumless aimless loamless nameless numbles rhymeless rumbles mailless umbles wimbles chimblies shameless