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.
neocon noggin
neocon con deacon rockoon recoin racoon bacon coni conn cony coon coin goon cone goony beckon icon cocoon cogon lagoon macon beacon logon racon reckon recon scone tycoon