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.
saucier saucer sassier sizer seizer sizier seiser cicero sissier scissor scissure sizar seisor seizor cesurae seisure seizure suasory
saucier busier icier juicer juicier gauzier lacier lousier mousier pacier racier saucer dicier douceur