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.
hulloas hullos holloas halloas hulloos hulloes hilloas hulls hulas hallos hollos hollas hellos hillos hallows hallahs hollows holloes helloes holloos halloos hilloes halloes halos hells hauls helos hills halls haloes helios hollies hueless hols heelless howls heels hilus holes heils hales heals hails haoles holies hoyles
halloas hulloas holloas hilloas willows zillahs tallows pillows sallows niellos ollas mellows mullahs gallows lilos callose cullays hulloos jellos hallows shallows wallas phyllos hilloes helloes follows fellahs halloos villous challas hellos felloes holloes hollos villas halloes hollas hillos fallows fellows hollows hulloes holloos fellas bullous wallows hallahs bellows hallos fillos alloys billows hullos callas mollahs allays allows chollas wallahs duellos scillas cellos nullahs villose paellas mullas mallows quillais gallous callous challahs yellows las
hullo hulloa hulloo hull hallo halloa halloo hallow hello hillo hilloa hollo holloa holloo hollow ahull