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.
ickiness icones icons ikons igneous
bagginess pokiness luckiness pugginess kookiness quakiness pickiness pawkiness shakiness legginess gawkiness leakiness bogginess cockiness jokiness rockiness tackiness cheekiness cakiness mugginess hokiness pigginess yuckiness bugginess ickiness wackiness geekiness fogginess sogginess shagginess beguines kines gooeyness sickness eucaines coignes bigness guineas beignes likeness chicness meekness cocaines hokeyness weakness packness koines vagueness skewness equines gayness deaconess quickness coyness keenness