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.
snaw snow sawn senna sauna sunna sinew scena snowy sinewy sienna sawney sunnah sin syn sen son sun sown zona seen sinh sone sewn sain sunn syne sene sane sine sign soon hyson scene scion seine sonny sunny xenia zonae