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