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.
nautili nattily nuttily natal neatly knottily nidal nodal notal nettle nettly nodule nudely needily nodally
nautili futile goutily outlie rutile utile til