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.
hulloos hullos halloos holloos hulloas hulloes hulls hallos hillos hollos hellos hollows hallows helloes hilloes halloes holloas holloes halloas hilloas hauls hells hulas hills halls halos helos helios hollas haloes hueless hollies hallahs hols heelless hilus heals hails heels hales howls holes heils haoles holies hoyles
halloos holloos hulloos loos holloes halloes fillos halloas hallos helloes villous phyllos holloas hollos villose hilloas hillos jellos callous gallows mallows niellos cellos duellos wallows shallows floosy hulloas hilloes hellos loose bullous billows bellows alloys fellows fallows follows hallows felloes allows hollows hulloes hullos callose gallous lilos mellows pillows sallows tallows willows yellows
hullo hulloa hulloo hull hallo halloa halloo hallow hello hillo hilloa hollo holloa holloo hollow ahull