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.
gargle gargoyle gurgle grackle caracole groggily caracal caracol caracul coracle crackle karakul craggily curricle
argle burgle gargle gurgle raggle regale reglue wriggle argal argol virgule hypergol circle darkle draggle tergal
cargo garigue grego grig grog groggy agaric