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.
salivary salver salvor sliver silvery slavery silver slaver solver sulfury sleigher sulphury sloughier sulfur
olivary salivary livery bolivar calvary delivery
saliva salify salve salvia salvo slieve