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.
kafirs kaffirs kefirs caviars gaffers caviares gauffers quaffers cavers gofers coffers goffers quavers quivers covaries
firs kafirs zaffirs kefirs kaffirs puffers fairs vires goffers paviors quaffers gaffers gofers bouviers reoffers sofars reifiers gauffers caviars suffers buffers coffers hoofers haviors feoffors feoffers zaffers zaffres defiers devoirs doffers wafers woofers chaffers chauffers loafers fiars reefers virus roofers offers refires fifers piaffers affairs heifers knifers liviers zaffars saviors lifers refers affaires niffers leviers reovirus fires furs vairs viers afars defers deifiers differs duffers whiffers chafers chaufers shofars