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.
straw strawy strew sutra stria strow stray satara striae star stir hysteria story stroy sitar stere stair satyr steer stour store stare setter suiter souter sitter stereo satori stoury seater storey starry satire stoure suitor suture sautoir sootier stourie sudaria sautoire
straw latria tuatara datura strow strew stray strawy satara redraw outrow nutria betray draw atria yttria trow tray tora stria sutra tetra tuatera
satay seta setae staw stay stoa stoae stoai