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.
stir stair satire star sootier sautoir sutra story stroy sautoire strew straw steer satyr stour stere sitar stray stria strow store stare stoure suture suitor setter storey satori starry seater suiter siddur stoury satara sitter strawy striae stereo souter seedier stourie zootier hysteria cider citer seder sudor