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.
racial rachial racially rachilla rachillae retial rashly richly
aecial facial faucial fecial racial social sial fetial lochial mesial nasial nuchal rachial retial
ratch ratio reach roach brach brachia orach orache trachea tracheae