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.
groaner grainer grainier kroner garner crowner coroner crooner grinner greener granary greenery greenier corner kronor kronur cornier careener coronary
groaner branner yarner trainer droner darner browner earner frowner ironer corner coroner crooner crowner garner grainer kroner learner prawner sorner drainer drowner warner yearner
groan gran grain grainy grana grannie granny groin grown groyne