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.
psi psoai pas pus pes pis poussie peso peas pees pehs piss puss pays pois hyps pase pice pose pass pews posy pies poos piso pows paws pias paisa poise poesy hypes passe paseo posse peise hypos pease pause paise pious piece poohs psoae pizza pussy passee piazza piazze