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.
curagh curragh curf crave curve curvy graph carafe curfew curvey coryphee
curagh curragh aargh aarrgh aarrghh graph paraph seraph sorgho teraph
cur craw cure curia curiae curie curio curr currie curry scurry