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.
drownd drowned droned darned durned drained trend deraigned trendy hydrant
drownd ironed crooned around browned frond frowned phoronid round crowned rondo ground marooned prawned preowned surround droned drowned