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.
creaked croaked cracked carked corked crocked crooked cricked cragged crocket grokked quirked cricket coracoid croquette coerect correct crewcut cricoid croquet
wreaked phreaked creaked freaked shrieked charked reeked troaked wrecked traiked cracked darked racked perked raked narked recked larked barracked wracked tracked barked marked beraked parked braked reracked harked croaked jerked trekked carked warked sharked yerked
creak creaky crack cracky crake creek croak croaky screak screaky