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.
nonego nongay kneeing
nonego neg dingo pingo mungo mongoe mongo mango lingo lanugo congou quango congo jingo fungo fanega bongo bingo pengo senega tango
none neon nine nona noon noun anon