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.
presser pressor pressure prissier parser proser purser preassure praiser pursier peruser prisere prosier pursuer pricer prizer pricier piercer
caresser presser dresser tressier drossier creaser prissier pressor grosser greaser grassier crosser cuirassier harasser verser foreseer brassier dressier reissuer terser crasser trusser
press pares peres pores prees presa prese preys pries priss prissy pross prossie pyres apres