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.
pigginess pugginess piggins pickiness pokiness pawkiness pignus packness pagans pekins piquance
bagginess pugginess sogginess shagginess legginess pigginess mugginess fogginess bogginess bugginess bigness pawkiness wackiness shakiness cockiness geekiness chicness gawkiness jokiness pickiness ickiness pokiness leakiness luckiness beguines rockiness cakiness cheekiness kookiness tackiness quakiness hokiness yuckiness