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.
cogon cocoon coigne cocain cocaine cockney coquina
cogon logon wagon tycoon doggone racoon coign logan coon gone goon goony gown agony agon agone begone bogan bygone hogan cocoon lagoon neocon rockoon tigon waggon shogun
cog coco cocoa coocoo cook cookey cookie cooky gogo