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.
cain can coin kain gain cane coign canna canoe canny cannie con kin gan quin kino kina guan gaen gaun conn cony kaon gane coni cone kana kane coon kine koan coney guano koine quean quoin
ain fain vain cain gain kain lain main pain rain sain tain wain chain an in