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