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.
tracker tricker trucker trickery trickier trekker darker trocar dorkier dragger torquer trigger draggier turgor
barracker racker cracker tracker brakier trucker creakier trickery prickier wrecker freakier parker brickier larker breaker croakier raker wreaker rocker croaker crockery marker pricker darker rockier phreaker tricker barker trickier rockery sharker
track traik triac trick trickie tricky troak trock truck turaco turacou strake