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.
hyson son sown sone soon scion sonny sun sin syn sen sane zone sine syne cion sain seen sewn snaw sign sawn snow sunn zona sene zoon
hyson son yon sone soon sown yoni