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.
psoai psoae psi peso piso paise paisa paseo poussie pes pas pus pis pias pays pehs pass poos posy pows pace pies paws pice piss hyps pose pase peas pois pacy pews pees puss