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.
radio radii rad roadie roadeo road riot raid redo read rato rodeo redia ready readd raita rediae rod rot rid red rat rede rued rudd rite rode rate ride reed root redd rood rota rote roti roto rout rude writ
radio ado wadi dado sadi roadie roadeo radii padi meadow qadi kadi gadi gaddi cadi fado audio dido shadow