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.
weed weedy wed weet wooed wud wad wet whet woad wide wite whid wade wadi wood wady waddy wheat white widdy widow woody
feed heed geed jeed cooeed meed kneed need peed reed seed deed teed weed ed