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.
crasser crosser creaser cuirassier grassier caresser creasier curser crazier courser grosser crosier cruiser coarser greaser carouser greasier crosshair curiouser crozer cursor grazer grouser corsair gorsier grazier cursory crozier cruzeiro grocer coercer grocery kreuzer
crasser harasser tressier dressier prissier praiser grosser greaser raiser raser reissuer brasier brassier eraser hoarser caresser coarser creaser creasier crosser cuirassier grassier greasier parser presser dresser drossier trusser
crass carassow craws crease creasy cress cressy crissa cross crosse curassow grass grassy