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.
cullays clays culls callas cullis gulleys cullies quillais colas class calls cauls gulls claws cloys quillaias caules coulis classy quells quolls callus quills clause coalas caulis coulees galleys callous callose callees gullies queleas collies guls cols galliass galleass coulisse coalless coals kills gules galls colza cools cowls galas kolas clews coles close calos coils clues gleys glass glias glazy koalas gallus coleus galeas calesa quails galahs kayles colies glassy guiles colossi coolies gallies gallous gallows glassie kellies killies
allays cullays lays hulloas fallacy callas clays belays alloys alleys hollas mullahs mulleys galleys ollas plays relays slays delays wallahs waylays challas quillais fellahs holloas mollahs flays fellas hilloas valleys villas volleys hallahs mullas halloas gulleys nullahs paellas pulleys scillas zillahs tellys wallas challahs chollas las