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.
kain kin kane kine kaon koan gain kino cain kana kina koine ken can gan keen quin gane gaen coin kuna guan kune cane keno gaun canna canny canoe coign guano quean quoin
ain fain vain cain gain kain lain main pain rain sain tain wain chain an in