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