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.
savior saviour savor savory savour savoury savvier saver suaver siver safer sofar sever safari severe sigher soever zaffir suffari
havior savior pavior vair dyvour vier devoir bevor savour bouvier savor favor heavier paviour livier favour haviour ivory jivier caviar leavier levier saviour savory savvier devour wavier