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.
coppices copses capizes capiases capsize
coppices spices apices toepieces paces pieces puces biopsies gipsies gypsies capizes kneepieces popsies seapieces spaces tapises lapises showpieces
coppice copies copious cowpies koppies