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.
gain gan cain gaen kain gane guan gaun guano goanna guanay guinea kin can gun gown quin goon kane kino kana coin cane gone kine koan kaon kina canna canny canoe coign gonia goony gunny koine quean quoin
ain fain vain cain gain kain lain main pain rain sain tain wain chain an in