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.
glass glassy glassie galas class gloss glias galleass galliass galahs classy glossa galeas glossy guls gals glossae goalless gleys glows claws glees glazy goals kolas galls gules clays colas gaols gulls glues glaze gales glace coalas gallus guiles clause callas koalas colossi gullies gulleys cullays gallies queleas keyless galleys goalies gallous gallows coalless colessee coulisse keelless quillais cols quillaias
class lass glass las lassi coalas lase galeas bolas galahs fellahs glassy viewless keelless bylaws gloss boylas hollas hallahs bowless paellas heelless moolas mollahs mealless queleas lasso galliass hylas hueless joyless claws colas lawless blase flaws tailless sheilas cholas doulas challas chalahs dahlias wayless wallas palais toyless tolas nullahs tieless rayless less fleas pilaus delays mullas soulless bless selahs slays coalless sailless lays plays koalas belays hulloas violas alias jawless clays classy floss flays keyless fellas glias bliss moolahs loss hulas paillasse holloas blaws cullays leas goalless quillais galleass molas awless mullahs callas laws feeless halloas alas mailless balas villas allays hilloas kolas pleas galas scillas boughless soilless slaws blahs zillahs nalas dewless pilaws vowless relays talas toeless ollas toolless wallahs palliasse waylays wheelless dalasi challahs chelas dulias chollas shoeless