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.
reefers refers referees reifiers reoffers revers reverse rievers reavers reveres reivers roofers reverso reveries ravers rivers rovers refires refries refreeze reovirus rivieras roughers refroze
reefers refers defers weevers woofers differs duffers lifers defiers knifers buffers fears zaffers rievers chauffers severs reoffers heifers coiffeurs hoofers kefirs goffers gofers gauffers gaffers chaffers laveers veers roofers coffers offers fifers puffers quaffers levers loafers niffers fevers suffers reifiers revers piaffers feoffers feres deifiers doffers wafers whiffers chafers chaufers chauffeurs
reefer reefier refer referee prefer