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.
caracol caracole caracal caracul coracle crackle crackly grackle karakul craggily curculio curricle gargoyle gargle
caracol caracal caracole caracul coracle miracle oracle charcoal
carack carrack crack cracky curacao curacoa