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.
furious furioso furies furs various furrows ferrous ferreous froes frows fours faros fries frise frisee ferias frouzy feuars vrouws frowsy fraise faeries fairies farrows ferries firs friz frays fares furzy farci feres varus frizz furze fiars fires froze frees frass vrows fears fores virus fairs frizzy vireos varies forays frowzy frieze pharos farcie varias foresaw foresee gharris veeries
furious carious curious various serious triose torous ferreous serous curiosa cirrous aurous rearouse furioso parous carouse arouse brios hydrous arioso ariose trios vrouws ferrous curios roues cerous grouse barrios rouse ariosi crouse porous cheerios