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.
creak creaky creek croak crack crake croaky cracky carack cark crag carrack cork corky cruck greek crock crook crick craggy crikey carioca crickey curacao curacoa croc grok kirk
wreak phreak freak break creak rake rack eureka carack arrack crack reck dreck rerack areca greek drake drek traik troak braky barrack wrack hayrack raku berake wreck creaky reek crake creek croak freaky raki arak carrack brake track trek shriek
care core craw crew cure acre ocrea ocreae recarry wreaker scree screw screwy