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.
hollo hollow holloo holloa hillo hello hullo holly holla hallo halloo hilloa hulloo hallow halloa hulloa hull halo hill hall holy hell helo howl hole haole holey hilly hooly hoyle hallah hoolie heal heil hila hili hail hale haul hula heel
hollo loll folio folly hullo hulloo hollow mallow solo allow olla holla hallow niello knoll oleo holloa colly fellow cello shallow cholla polio halloa polo follow willow hillo phyllo quoll dolly jolly tallow golly wallow hallo moll molly alloy bellow olio knolly nolo hello fillo pillow doll lolly mellow holly jello hulloa boll fallow holloo felloe coolly hilloa wholly kolo toll callow duello lilo billow woolly sallow bolo roll halloo poll cholo yellow