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.
treble trueblue trebly triable trouble terrible tearable tribal drabble durable dribble terribly tribally drably dribbly durably doorbell
treble barbule hearable hireable roble rouble variable ruble arable rubble dribble tearable barrable pourable triable hyperbole trueblue marble wearable grabble sharable curable rebel bearable durable verbile hirable friable fireable fribble burble brabble errable drabble terrible rabble parable trebly mirabelle trouble gribble warble garble wirable horrible shareable