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.
furioso furious furies furs furrows frise frows fries fours faros froes frisee frowsy fraise feuars ferias ferries various fairies faeries farrows friz firs feres fores fears frays frees fiars froze verso furze fairs farci furzy vrows fares frass frizz fires pharos vireos forays varies frizzy varias frowzy frieze farcie ferrous foresaw foresee gharris veeries
arioso furioso triose trios serious proso curious curiosa carious curios various furious brios barrios ariosi ariose cheerios