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