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.
coracoid cricoid cracked crocoite corked coerect correct cragged creaked cricked croaked crocked crooked corrugate carked
hyracoid coracoid ericoid cricoid percoid sarcoid
carack crack cracky curacao curacoa