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.
bloodier blottier bolder blader balder boulder blotter builder bloater bowlder bladder bleeder bouldery bladdery blighter balloter balladeer belter bolter blatter bleater balladry billeter
bloodier folder soldiery solder polder older moldier loader loiter louder bolder flooder leadier cloddier holder cloudier clowder colder gladier golder molder mouldier plodder reloader soldier wieldier