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.
curfs curfews curves carafes curaghs curraghs kerfs corves carves griefs griffs gruffs craves corvees griffes crevasse coryphees
curfs turfs surfs profs sharifs wharfs zarfs serifs serfs gruffs kerfs barfs arfs ruffs rifs refs sherifs
curf curfew corf curagh curragh curve curvey curvy scurf scurfy scurvy