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.
turd toured trad trod trued treed tared triad tread tyred dured trade tired trode tried tardo tardy torrid triode turret teredo tirade toroid tiered teared tarred tarried trot tart tort tret treat torta droid dared tarot dread trait druid torot trite dried dreed trout tarty torte
burd curd gourd nurd surd turd urd