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.
rockoons racoons reckons racons recons rockiness recanes recoins reigns
rockoons goons tycoons cocoons kaons koans beckons eikones eikons ikons coons cogons lagoons leukons logons neocons racoons reckons daikons weakons