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.
ammonia amnia ammono amboina amboyna amnio ammine ammino amen amin amain amine amino
pneumonia ammonia hymenia mania monie amnia hypomania ramona somoni zoomania mon