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.
nidify notify
edify codify modify nidify reedify dif defy deify diff beatify beautify notify ratify redefy citify
nidi nide nodi nudie indie cnida cnidae snide