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.
redrew redraw redry retire retore redear redder reader readier retiree reedier retry rater rider ruder radar retro rioter ridder rudder raider ratter rooter retear rotter router ritter rudery writer rattier reutter rootier rowdier ruddier ruttier
drew redrew hydrae redraw padre outthrew moidore madre cadre adore dare dure dree draw dore dire dere strew
red read uredia rewrite reread credo readd ready redd rede redia rediae redo reed reedy rued bred brede ired cred reared reroute rewrote uredo