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.
niellos nills knells nils nellies nails noels noils nolos nulls kneels knolls nullahs nalas
hellos duellos niellos jellos cellos ells hullos phyllos hollows holloas fells tells hulloos allows jells helos tellys hollos hilloas bullous fellas belles holloos paellas yellows shallows hulloes villose sells sallows telos bellows mellows knells lilos gallows callous wells villous willows holloes felloes bells selles hallows hallos helios hells mells follows hulloas pillows fellows dells halloas hillos gallous fallows halloes shells helloes tallows cells alloys mallows hilloes wallows quells callose belows halloos fillos billows yells els
nielli niello nill knell nellie nelly snell nil