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.
creasier creaser greasier greaser crosier crazier crasser cuirassier grassier caresser curser cruiser crosser coarser corsair crozier gorsier grazier courser carouser cruzeiro crosshair curiouser crozer cursor grazer cursory grosser grouser kreuzer grocer
brasier creasier greasier tarsier drossier raiser pursier raser prissier rosier parser gorsier brassier greaser grassier cuirassier racier creaser brassiere crosier frowsier drowsier dressier prosier praiser brazier crasser crazier horsier hoarser harasser eraser grazier coarser tressier
crease creasy greasy carassow cares caress cores crass craws cress creese cressy crews cries curassow cures grease acres