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.
meadowy meadow mead meaty mayday mad med meat meta maid meed made maud moody motey mooed matey middy medii media muddy mediae meoued midday moiety miaoued
shadowy meadowy meadow dowdy shadow dow ado