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.
digammas dicambas digamies digamous dogmas degames degamis degums
gammas digammas camas camass commas gamas gamays gambas gummas agamas agmas jicamas magmas dicambas chacmas
digamma digamy degame degami dicamba