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.
caracal caracol caracul caracole coracle crackle crackly grackle karakul craggily curculio curricle gargle
caracal caracol caracul coracle lyrical miracle oracle percale cercal turrical warragal charcoal
carack carrack crack cracky curacao curacoa