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.
readd read redd ready rad red road raid rued rede rudd reed redo ruddy redia reata reedy radio wried radii roadie rediae roadeo rid rod rat ret rite rude rete ride rote rode rato rota rate rood
readd add teddy daddy ready paddy gaddi read neddy knead mead leady heady lead bead head baddy faddy eddy eddo beady caddy redd dead waddy