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.
coalas coals colas koalas callas cols clays cauls class calos coles cools cowls coils galas claws kolas calls goals coalesce coalless callus coulis colies galahs caules clause galeas classy calesa caulis coleus coulees callous cullays colossi goalies callees collies callose coolies gals colessee galliass coulisse goalless galleass clues close kails koels glias gales galls culls clews kales kolos kohls colza glass cloys gaols quails cullis gallus glassy kayles quolls cullies galleys gallies gallous gallows glassie queleas 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
coal coala coaly col cool scall call coagula calla goalie callee coyly callow coulee calo coolly caul coil cole cooly collie cowl colly goal coly koala cola scale coolie scaly