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.
holloa holla hollo holloo hulloa hilloa halloa hollow holly hullo hillo hello hallo hallow hulloo halloo hallah hole halo hull hila hill hell holy howl hula hall helo haole hilly holey hooly hoyle hoolie
halloa hulloa holloa hilloa challah pillow wallah nullah zillah mollah cellae quillai paella hallah mullah hallow mallow hillo sallow shallow tallow fallow callow jello allay felloe fellow hollow villa phyllo follow fillo fellah willow wallow bullae hello challa cello walla pallia scilla niello cella mellow olla cullay mulla hollo lilo duello halloo cholla holloo allow calla hulloo holla bulla hullo billow fella hallo villae alloy bellow yellow