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.
crosshair crosser corsair crosier cuirassier crasser grosser crazier crozier carouser grassier creasier caresser curiouser crozer cursor curser courser creaser cruiser cursory gorsier grazier coarser grouser cruzeiro greasier