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.
rudd ruddy rued redd rude readd red rut rid rad rod rood rede read rode rout redo raid ride road reed radii radio ready redia reedy rodeo route rowdy rutty wried