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.
carouser curiouser cruiser coarser grouser crosser crosier courser caresser crozer curser crozier grosser creaser crasser creasier crosshair cursor grocer cuirassier coercer crazier cursory gorsier greaser grocery kreuzer grassier greasier grazer
rouser trouser grouser curiouser arouser carouser courser trusser grosser hydrosere curser dorser cruiser purser crosser bruiser peruser rooser proser browser prosier rosier xerosere rosery drosera crosier nurser worser