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.
koalas kolas coalas coals koels colas kolos goals kales kails galas kohls callas kayles galahs galeas goalies gals cols galleass coalesce coalless goalless galliass calls clays gales claws glias cools class coils glass calos cauls kilos keels cowls kills coles gaols galls coleus callus caulis glassy colies quolls quails coulis classy gallus calesa caules clause glassie collies coulees gallies galleys cullays gallous keyless coolies callose callees kellies colossi callous killies queleas gallows colessee coulisse keelless quillais
balas talas alas coalas koalas galas nalas las als cullays allays ales veals bals false bylaws belays lass vials hollas blahs ails halls awls balls calls jails fellahs boylas slaws tales phials sals foals sauls relays colas alls meals blaws males calos bales glass palais claws hallahs dahlias zeals gaols laws plays vails waylays wales wallas dalasi sails wauls delays tails reales pilaus chalahs challas dulias cholas shales shawls dals sheilas talus sials tolas whales pawls seals falls ollas rails doulas galls jouals callas bails pals cauls class galeas quails also quillaias hulas coals lalls hauls blase fleas violas taels balsa pilaws pails nullahs moolas heals sales leas kales reals glias hails bialys lays bawls mullas selahs alias molas slays talls lase fails clays flaws hilloas gales baals holloas hales mullahs goals bolas hylas nails miauls hulloas kails villas valse pales halloas rials mollahs zillahs aals malls moolahs palls paellas mauls vales mails palsy deals bialis salsa fellas quillais kolas flays gals queleas halos galahs wheals challahs wails wallahs walls dahls rales wawls dales duals pleas weals dials chelas peals chollas shauls sheals scillas shoals teals yawls
koala coal coala coaly goal goalie kail kale koel kohl kola kolo skoal