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.
assure azure
sure fissure reassure measure seisure chaussure leisure scissure rasure assure caesurae chasseur sire azure seizure tussur diseur maiasaur sura cesurae poseur sore sour suer masseur reissuer sere tussore usury desire cesura issuer caesura