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.
whidahs whydahs whids wides whats whits widows wheats whites widdies whiteys whities wats wads wits weds weeds whets wades wadis waits watts wites woads woods wadies woodsy waddies woodies
whidahs dahs houdahs howdahs ideas keddahs odahs whydahs chuddahs ids