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.
hill hilly hillo hilloa hull heil hall hell hili hail hila hollo hello hullo hallo holla holly hollow hulloa halloa hallow holloa holloo hulloo hallah halloo holy haul helo hula hole hale heel heal halo howl haole helio holey hooly hoyle
bill kill shill will dill vill hill ill gill jill fill maill quill mill nill pill rill sill zill till chill yill