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.
gribble grabble garble grubbily curable garboil crabbily gorbelly corbeille corbel corbeil curably
gribble fribble dribble rabble rubble brabble friable variable horrible grabble drabble dribbly terrible triable