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.
again agon akin agone agony acne
gain again regain gan biggin takin pagan began piggin vegan noggin eucaine logan bogan leggin akin hogan cocaine guan gaun gane gaen cain cocain lagan ligan kain nagana wigan