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.
mud maud muddy mid meoued mut mod med mad miaoued mute mead mood midi maut maid modi made meed mode mutt media medii middy moody mooed mayday meadow mediae midday