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.
steamier steamer stemmier stammer stemmer stemmery sawtimber
steamier dammer doomier tamer vitamer metamer metamere stammer steamer stemmier
steam steamy stem satem stemma stemmy