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.
barracker barker barkier brakier brickier broker burker bragger breaker braggier broguery
racker barracker cracker tracker raker rocker wreaker wrecker brakier breaker phreaker croaker pricker tricker trucker