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