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.
sambals smalls cymbals samiels symbols cembalos sawmills seamless symbolise smells smiles similes smileys sumless symbolize cymols
gimbals timbals sambals tymbals cymbals jumbals mails males bummalos fumbles ambles meals tambalas malls gambles numbles kamalas mumbles camails rambles rumbles smalls mammals females bumbles wimbles gambols tamales gumballs symbols hamauls hamals cembalos remails ramblas nombles jumbles tamals mauls umbles emails fimbles gimmals humbles hammals timbales tumbles umbels wambles shambles