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.
deafen daven define devein devon divan doven daphnia dauphin diaphony
deafen fen faena haven heaven caffein leaven maven raven daven shaven
deaf def daff daffy deave defi defy deify deva