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.
prosier proser pursier prissier pricer parser prizer purser presser pricier prisere praiser pursuer piercer pressor pressure preassure peruser
rosier prosier crosier brasier drowsier drosera dorser pursier grosser proser gorsier rouser cuirassier rooser rosery grouser tarsier trouser greasier arouser brassier xerosere browser hydrosere drossier brassiere dressier prissier frowsier curiouser tressier grassier crozier crosser creasier carouser horsier worser
pros porose praos proas prose proso pross prossie prosy prows pyros uprose