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.
halloas hallos hilloas hallows hulloas halloos hallahs holloas halloes halls halos hollos hillos hullos hellos hollas haloes hollows hulloos holloes hilloes holloos helloes hulloes hulas hails hells hulls hills heals hales helos hauls haoles helios hollies hols heelless heils hilus holes howls heels holies hoyles hueless
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
hallo halloo hallow halloa hall halo holloo hulloa hullo hollow hillo holloa hollo hilloa hello hallah hulloo