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.
herdic heretic hieratic
bardic herdic nordic aortic faradaic faradic veridic iridic juridic cardiac quartic parodic periodic pyridic druidic triadic
herd hard hardy heard heart hearty heired hereat hereto heriot herried horde