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.
vodoun voudoun vodun voudon photon
voudoun vodoun don dun down udon dune redon adown odeon bedouin guidon dona done beduin godown vodun lowdown voudon radon hoedown redone codon showdown