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.
voudon voudoun vodoun vodun futon photon
voudon udon don futon odeon mouton louden dona done down tauon adown boudin radon bouton vodoun hoedown codon godown guidon lowdown muton puton redon soudan voudoun redone showdown