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.
curacy crazy creasy curiosa cuirass curs curassow cures grace grays croci crass currs curse craze craws cressy grassy coerce curios coryza crissa course curies crease greasy curious curries carassow
curacy racy piracy frays trace forays drays mercy pricy crazy farcy hurrays hoorays hearsay bewrays brays arrays rays race grays morays brace grace prays derays terrace trays
cur craw cure curia curiae curie curio curr currie curry scurry