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.
crosser grosser crosier crasser caresser carouser curser crozer curiouser crosshair courser creaser grouser cruiser coarser crozier cuirassier creasier grassier cursor grocer coercer corsair cursory gorsier greaser grocery crazier greasier grazer grazier kreuzer
crosser grosser caresser carouser crasser crosier cuirassier curiouser prissier grouser prosier dorser dressier drossier tressier trusser browser harasser brassier arouser rouser rosier rosery rooser grassier reissuer presser proser xerosere dresser drosera hydrosere trouser worser
cross crosse crass cress cressy crissa crouse crows gross across