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.
quickness quickens quakiness cockiness cakiness cockneys coquinas gawkiness kookiness coignes cocaines kokanees
quickness packness sickness shakiness cheekiness wackiness deaconess pawkiness quakiness rockiness pickiness cockneys meekness luckiness likeness leakiness kookiness cakiness jokiness geekiness ickiness gawkiness hokiness tackiness pokiness weakness hackneys chicness cockiness yuckiness