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.
reedy reed ready red redd read rued rede rete redo readd rowdy wried retie ruddy redia rediae rod ret rad rid raid ride road rode rood rote rudd rate rude rite
needy reedy weedy seedy deedy queued weed reed teddy cooeed need deed eddy kneed seed ready neddy peed feed beady jeed beedi geed heed heady meed feued teed leady
ree bree free gree pree dree tree