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