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.
phreak freak freaky
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