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