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.
logon logan lagoon logania lagan ligan laguna lagune leggin leukon
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
logo logoi log laogai loco loggia loggie loggy look blog flog clog cloggy glogg slog