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.
befell befall bevel beflea befool befoul beefalo beefily biofuel boffola buffalo
befell fell refell duffel defuel rifely refill ravelly felly refel refall novelly novella fall feal feel fella fill biofuel favella kvell levelly nouvelle fuel novelle refuel refeel safely full dewfall befall wifely