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.
leafy leaf leavy leva levy lief loaf leave lev lav lava lave levo life live loof love luff
leafy baffy beefy heavy leaf leavy peavy reefy reify daffy deaf defy deify taffy chaffy sheaf
lea flea ilea leal leally olea plea