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.
parser proser purser praiser peruser pursuer presser pursier prosier prisere prissier pricer prizer pressor pricier pressure preassure piercer
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
parse pars pareus pares pareos paras pairs presa press pariahs pros proso prossie purs pursue spares spars priss paries paris prissy parries parrs pears perse prase prese prise parous prose pross prosy purse pursy sparrows sparse