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.
maud mud mad maid mead maut made miaoued muddy meadow meoued mayday mid mut med mat mod meadowy meed mute mode modi matt moat midi mate meta meat mood mutt matey matte meaty media medii middy moody mooed