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.
proser prosier parser purser praiser peruser pursuer presser pursier prisere prissier pricer prizer pressor pricier pressure preassure piercer
rooser proser bursera raiser friseur rosery rosier riser cruiser gorsier curiouser greaser grocer creasier reissuer raser crasser pursier coarser prissier trusser caresser peruser verser presser hoarser nursery tressier prosier xerosere dresser drosera drowsier tarsier grouser foreseer crosser horsier carouser courser grosser arouser crosier greasier grassier creaser cuirassier curser crozer bruiser brassier browser nurser parser pursuer trouser terser hydrosere drossier dressier dorser purser frowsier rouser brasier eraser prisere harasser praiser worser
pros prossie proso pross prose prosy presa uprose prase pursy proas purse prise prows parous prese pars parse perse press prissy priss purs praos pursue porous pyros porose uprouse