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.
galas galahs galeas gals glias gaols goals gales glass galls galliass galleass callas koalas glassy gallus coalas goalies galleys guls gallies glassie gallows gallous goalless gloss kales gules glaze glows claws calls calos cauls clays glace glees gleys coals kolas kails class colas glazy gulls glues callus quails classy caules caulis guiles clause calesa kayles glossy queleas gullies gulleys cullays callous callose callees coalesce coalless quillais cols quillaias
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
gala galah gal gaily gale galea galeae gall galley gally gaol gayly goal goalie egal