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.
piousness puisnes paisans paisanas piscinas poisonous paesans poisons paesanos paisanos passions puissance
piousness fussiness wiseness sissyness sassiness puisnes nosiness newsiness mousiness biasness bossiness business busyness easiness baseness gassiness cosiness queasiness looseness lousiness massiness messiness mossiness mussiness noisiness bassness rosiness sissiness usneas cheesiness