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.
dribble drabble dribbly durable triable terrible tribal treble drably durably trouble doorbell tearable terribly tribally trueblue trebly
gribble fribble dribble rabble rubble brabble friable variable horrible grabble drabble dribbly terrible triable