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.
umbels umbles umbilici
umbels fumbles pummels pumelos nombles pomelos mels mewls kummels bumbles ambles fimbles timbals symbols tymbals samiels umbles cymbals wimbles rambles meals gimbals jumbles pummelos pommels mumbles numbles gambles camels gambols jumbals gimels humbles dumbbells smells tumbles sambals mells rumbles wambles ramblas shambles