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.
read ready readd rad red rued road rede redo reed raid redd reedy wried reata radii redia radio rediae roadeo roadie ret rat rid rod rato ride rite rete rudd rode rota rate rood rude rote rodeo write raita ratty riata rowdy rotte rhyta ruddy retie route wrote
bead head lead mead knead read dead ad ed