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.
dreggier draggier druggier dragger dorkier trigger darker trekker tricker trickery trickier turgor
braggier froggier craggier groggier draggier dreggier druggier rigger rugger bragger groggery priggery progger dragger trigger
dreggy dreg draggy druggie druggy