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.
coign coin con conn cony coon coni cone cain quoin koine coney kin can gun gan gaun quin koan gaen gain gane kain guan goon gone kaon kina kine gown cane
coign feign foin join coin koine quoin loin reign sign deign