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.
redry retry redrew redear rudery redder redraw reader reedier readier rater ruder retro rider radar rooter retore router ritter rioter retire rotter rudder ratter ridder retear raider rotary writer rattier retiree reutter rootier rowdier ruddier ruttier
redry dry battery bootery buttery eatery feeder feodary bawdry feudary heeder cattery lottery lieder needer deary rudery cedary seder sudary tawdry watery chattery cheder gaudery terry pedro deray pottery teary powdery poetry nitery mattery dray guttery littery cautery heder jittery derry dory retry cedar ceder seeder doddery tottery weeder cheddary shuddery
red read uredia rewrite reread credo readd ready redd rede redia rediae redo reed reedy rued bred brede ired cred reared reroute rewrote uredo