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.
howl holy hole haole hooly hoyle hollo holla holly holey hallow hollow hoolie holloo holloa halo hull heil hail hili heal hill hila hell heel hall hale helo haul hula hallo helio hello hillo hilly hullo
bowl fowl howl jowl cowl owl yowl