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.
redo red read rued reed redd rede radio reedy wried readd ready rodeo redia rediae roadeo rid rod rad ret rot rete roti rite road rate root raid rode rato ride rote rudd rota rood roto rude riot rout rowdy write rotte route radii ruddy rooty reata retie wrote