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.
defiler devilry
filer defiler whiffler waffler rufflier eviller siffleur ruffler rifler reviler raffler muffler caviller caviler bifilar riflery baffler filar viler veiler flier fleer filler riffler eviler wafflier shuffler