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.
moody mood mooed mod moot modi mode motey muddy middy motto midday moiety meoued mayday miaoued mad mud mid mot meadowy med midi mity moat made maid maud mote mead mott meed
boody goody hoody doody moody woody looed rowdy good rood cooed hooty zooty pood zooid ptooey noddy mood sooty shoddy today wooed howdy toady pooed food rooty booty soddy booed hood tody mooed body toddy wood dowdy footy shooed