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.
candour candor cantor condor contour coendure canter gander country counter quandary gantry kantar kinder qindar cointer gaunter gauntry
pandour candour tandoor rondure bandora bandore endure enduro vendor indoor candor coendure condor contour pandoor pandora pandore pandura santour undoer
candy caned canid cannot canoed canto condo scandia