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