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.
woad wad wadi wood wade wady wooed waddy woody woodie waddie wot wat wed wud weed watt wide what wait whid weedy wheat widdy widow
goad load road toad woad ad od