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.
paws pas pews pays pows pass peas pase pias paseo passe paisa pease pause paise passee pis pus pes psi powwows piso poos pois piss puss pees pehs pace hyps pies peso pacy posy pose pizza poohs poesy psoai peise posse pacey poise pious peace hypes psoae hypos pussy
vaws saws shaws chaws waws taws daws raws haws paws gnaws maws laws caws jaws yaws as