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.
holy hooly holly holey howl hole hoyle hollo haole holla hilly hollow holloa holloo hoolie hull hili hall hill haul hale heel heil halo hell hail hila helo hula heal hallo helio hello hillo hullo
holy hooly coly cooly moly poly dooly wooly