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.
rambles ramblas rumbles ramilies ramillies rimless ramulose ramulous rhymeless remails
bumbles fimbles nombles wimbles tumbles gambles rumbles umbles shambles jumbles numbles humbles fumbles wambles mumbles rambles ambles foamless sambals timbals ramblas loamless similes tamales smiles gemmules aimless gimbals chimbleys limbless umbels chimleys miles males jumbals chimblies moles mules seamless tombless gambols gumless amoles beamless cymbals timbales rimless sumless females tymbals symbols
rambla ramble ramal ramilie ramillie rumble rumbly bramble brambly