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.
prissier presser pricier prisere prosier pursier praiser proser purser pricer prizer parser pressor pursuer pressure preassure piercer
brassier drossier tressier prissier grassier dressier cuirassier pursier harasser grosser brasier rosier crosier drowsier presser gorsier caresser brassiere crosser creasier frowsier crasser prosier horsier dresser greasier reissuer tarsier trusser
priss prissy paris peris praise press pries prise pross prossie puris uprise