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.
curiouser carouser curser cruiser grouser crosser courser crozer cursor cuirassier grosser crosier cursory crozier coarser creaser crazier crasser creasier caresser coercer corsair gorsier grazier greaser cruzeiro grassier greasier crosshair
curiouser rouser arouser carouser courser grouser trouser
curious carious curios curiosa