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.
savoury savory savour saviour savor savior saver suaver savvier siver safer sofar sever safari severe soever sphery suffer suffari
savoury favour haviour ivory paviour saviour savory savour devour dyvour