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.
bouldery boulder bolder builder bowlder bladdery blader balder bolter bladder bleeder bloodier balladry balladeer belter blotter blatter bleater bloater balloter billeter blighter blottier
bouldery blader alder aulder holder balladry bladdery balder mouldier solder polder soldiery moldier milder deluder killdeer welder golder wielder colluder wilder gilder shoulder colder lader boulder molder fielder eluder folder builder bowlder elder moulder slider older soldier melder bolder solider guilder toiletry glider welldoer collider wieldier gelder shielder caldera yielder