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.
mellows mallows mells mels milos malls mewls mulls meals mealless molls mills milles mullas maills melees mollahs mollies mulleys mealies malleus mullahs mallees mols mils mailless moles mules mauls moils molas mails mools males miles muleys mailes miauls molies moolas milieus moolahs mooleys muhlies
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
mellow mell mallow smell smelly mel