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.
con coni conn cony coon coin cone coney coign can kaon cain cane gone goon gown koan canna canny canoe gonia goony koine quoin cannie goanna gooney goonie