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.
rasure reassure raser raiser reissuer racer razer razor riser racier rooser rosary rosery rosier rouser rosaria
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
ras wrasse trass prase grass raise rase raws rays rias rais brass bras brassie brassy eras erase frass crass grassy praus urase