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.
ferrous ferreous ferries furrows furious farrows fears froes frows fours feres faros feuars frowsy frouzy vrouws ferias various faeries furioso firs furs gheraoes verse varus frass verso fares frays frees viers fairs froze fiars fries vrows fires virus fores veers frowzy forays vireos pharos fierce furies fairies foresaw foresee gharris veeries
ferrous cirrous borrows burrows farrows ferreous furious furrows burros various curious carouse karroos morros narrows roues serious sorrows torous churros harrows barrows porous carious cerous barrios cirrose rearouse parous morrows aurous grouse crouse marrows vrouws rouse arouse arrows cirrus serous hydrous charros yarrows
farrow ferry furrow furrowy fer fro