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.
fissure fusser fussier visor fizzer fozier fizzier fuzzier viscera
assure reassure chaussure scissure fissure sure reissuer tussur tussore seisure masseur rasure measure leisure caesurae issuer chasseur cesurae