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.
ramblas rambles rumbles ramilies ramulose ramulous ramillies remails rimless rhymeless
ramblas molas chimlas wambles umbels tumbles timbals symbols cymbals rambles ambles bumbles fimbles fumbles humbles gimbals jumbals jumbles gambles gambols kamalas mumbles nombles numbles rumbles sambals tambalas tombolas tymbals umbles wimbles shambles
rambla ramble ramal ramilie ramillie rumble rumbly bramble brambly