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.
heel hell helo heal heil helio hello haul hole hili hail hull hale hila hall howl halo holy hill hula hooly hilly hillo hoyle holey holly hollo holla haole hallo hullo
eel feel heel keel kneel peel reel seel teel weel wheel el