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.
simoon simony saimin simian somoni summon someone symbion semen soman seaman seamen semina zoomania
simoon moon mon daimon summon bemoan lemony moan mono mony moony mown muon gnomon ammono jomon kimono lemon mammon newmown simony camion ramona somoni common daemon gammon demon