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.
person persona personae parson prison parazoan preassign porcini porcino
parson arson person orison whoreson grison treason sarsen prison persona coarsen garrison hoarsen frisson boursin resown reason warison worsen
perse peres operas aperies pursue purs prossie proso pros priss press parse pears peeress peeries peers pars perries prissy apers pursy purse prosy pross prose prise peris prese presa prase piers pierce peruse operose