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.
known neon nona none noon noun gnawn nan nun naan nana nene nine
known now own winnow town down snowy know enow gown lown minnow mown gnawn noun snow neon sown nona downy none towny noon shown
known know now knew enow keno kino snow snowy