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.
staig stag staggy staggie stack stake steak stick stoic seadog sticky
staig tag taiga latigo retag stag tautaug
sadi said satay sati seta setae staw stay stoa stoae stoai tacit