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.
breaker brakier barker broker burker barracker barkier bragger braggier brickier broguery
wreaker phreaker breaker shrieker trekker darker marker croakier racker raker reeker reekier wrecker barker barracker croaker brakier larker freakier parker jerker tracker cracker sharker creakier shriekier