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.
packness pawkiness pickiness pokiness pigginess pugginess pagans pecans pekans pekins paganise paganize piquance pignus
quickness weakness meekness sickness packness skewness hackneys legginess pickiness leakiness cockiness jokiness ickiness tackiness deaconess hokeyness pokiness gawkiness bugginess coyness bigness gayness bagginess skenes kanes chicness shakiness vagueness fogginess akenes eikones wackiness mugginess kines likeness luckiness geekiness cakiness cockneys hokiness rockiness sogginess kookiness bogginess gooeyness keenness quakiness pawkiness pigginess pugginess cheekiness shagginess yuckiness