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.
begot begat bigot bugout baguet becket begged bucket backout biggety biggity bouquet boycott baguette
begot got takeout zygote goat gout begat bigot bugout faggot faggoty fagot gigot maggot maggoty magot pigout ragout dugout shakeout