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.
likeness likens leakiness legginess luckiness ligneous ligans lacunes lagunes leggins leukons lagans logans logons
vagueness likeness ickiness geekiness jokiness cockiness kookiness quickness hokiness legginess fogginess luckiness leakiness pawkiness pigginess pugginess sickness skenes sogginess tackiness weakness chicness shakiness mugginess hokeyness bugginess bogginess coyness bigness bagginess akenes keenness gooeyness quakiness gayness cakiness gawkiness meekness packness pickiness pokiness rockiness skeanes skewness deaconess wackiness cheekiness shagginess yuckiness