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.
hillo hilloa hill hilly hullo hallo hello hollo halloa hollow holloa hulloo hallow halloo hulloa holloo hall halo hull helo hili hell heil hila hail holla helio holly hallah hole holy howl hula hale haul heal heel
hillo fillo ill dill rouille fallow bill jello hulloa alloy hollow hilly faille gill fill bellow phyllo holloa felloe villa billow rill halloo sallow tuille yellow shallow duello chilli willy kilo will tallow hallo mill niello callow pill mallow lilo sill milo silo hill billy chilly mellow maill dilly pillow illy willow rille till quill scilla hello fellow nill cello hilloa gilly silly kill mouille hollo filo follow vill villi halloa hallow fille mille jill holloo shill hullo hulloo filly allow zill taille wallow chill yill