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.
cliffy cliff coalify calif gliff qualify calf clef clavi gulfy kalif caliph clivia colluvia
cliffy bailiff fluffy vilify jellify jollify cliff coalify gliff qualify mollify nullify salify