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.
silkily sulkily silicle slackly sleekly slickly silicula siliculae sulcal
balkily bulkily milkily silkily sulkily leakily luckily flakily flukily pluckily
silkie silk selkie silica siliqua siliquae silique silky