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.
kaon kana koan kane kain koine ken can gan kin con gain coni gown coin gone kuna kine goon cain gaun guan gaen kune cane cony cone coon conn keen kina kino keno gane canny canoe coign coney gonia goony guano canna quean quoin