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