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.
coalify calif cliffy calf qualify cliff kalif caliph clef golf calve clavi gliff gulfy clivia kaliph
qualify coalify salify alif vilify jellify jollify calif cliffy kalif mollify nullify
coal coala coaly collie coolie goalie col