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.
garigue grig grog cargo greek grego crikey groggy carioca crickey karaoke
garigue rogue argue brogue morgue perique pirogue reargue drogue rig