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.
beefily beefalo bevel befall befell befool befoul beflea biofuel boffola buffalo
beefily filly huffily goofily liefly puffily refile refill refly daffily deafly defile weevily chiefly fil fly