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.
farci farcie farce farcy friz fairies faeries fears fairs frise fries fiars force frizz faros fares frieze frizzy furies fierce frisee varias fraise varies feuars farrows ferries furioso furious gharris various gharries pharisee firs furs vars
farci farce farcie farcy croci laris naris paris cerci saris souaris tarsi
far faerie faery fair fairy fare faro farrow fear fiar afar