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.
furzy furze frizzy frowzy frouzy furs friz frizz froze frays fours farcy frowsy freeze forays feuars frieze furies furioso furious furrows firs
furzy frouzy furze crazy pursy
fur four furrow furrowy furry fury