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.
curser courser cursor curiouser cursory creaser coarser cruiser crosier crasser crosser cuirassier creasier caresser carouser crozer crozier grouser crazier greaser gorsier corsair grosser grassier greasier crosshair grazer grocer coercer grazier grocery kreuzer cruzeiro
verser courser parser hoarser dorser worser nurser coarser curser terser purser brasier friseur presser rooser nursery sarsar creasier crasser browser cuirassier prisere cruiser grosser bursar reissuer hydrosere coercer trusser tarsier tressier drowsier dresser eraser mercer curiouser rosery gorsier rouser pursuer frowsier harasser foreseer crosser carouser grassier caresser fiercer horsier brassier raiser creaser prosier praiser proser cursor bruiser crosier riser xerosere drosera piercer rosier trouser raser greaser peruser drossier dressier pursier prissier forcer farcer grouser bursera arouser greasier
curs curse carse curios cures curacy cuirass cruse crus crosse cross cars crissa cressy curious crass course corse cors curassow curies curiosa curries cris cress currs scurries