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.
farce farcie fares force farci farcy fierce fairies faeries froze fries frise fiars frees fears froes fairs fores faros furze fires feres furies varies fraise feuars frisee frieze freeze farrows ferries foresee ferreous gharries pharisee firs friz furs vars
farce farcie lares carse coerce hearse hares hoarse fierce fares tares force source terrace price trace parse truce orrice chares marse farcy farci arse nares mares coarse grace rice ares cares bares brace race terce dares tierce rares trice pierce wares pares shares
far faerie faery fair fairy fare faro farrow fear fiar afar