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.
reefs refs reifs reives revues reeves reaves reifies rifs reviews revs ruffs roves riffs rives raves roofs raffs raphes reface refuse revise ruffes rufous raffias reavows revoice roofies roughies roughhews
keefs beefs reefs efs neves coffees peeves keeves nieves reeves reifs kiefs jefes sieves levees teffs chefs sheafs jayvees fiefs cuvees beeves vees ghees fees kefs leafs eves neifs effs refs seifs feoffees defis toffees chiefs sheeves
reef reefy ref reeve reif reify rereview tref trefah