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.
clue clew glue cole gluey coolie coulee callee collie col calo glee call cool cowl cull caul coly claw coil cloy kale clay cola gale coal gley galea quale calla colly coaly cully coala cooly guile coyly quell
blue flue value clue glue slue