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.
creaky creak croaky cracky creek croak crake corky crack craggy carack crikey crickey carrack cark cork crag crick crock crook cruck greek quirky carioca curacao curacoa
creaky freaky drecky sarky narky larky croaky creak cracky jerky freak phreak break braky barky wreak rekey reeky perky darky shrieky
care core craw crew cure acre ocrea ocreae recarry wreaker scree screw screwy