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.
galah gala galea gal galeae gaol gale goal gall gayly calla koala coala gally gaily qualia goalie galley gul call clay coal calo glee gley caul glow glue claw gull kail kale cola kola glia
galah chalah ala challa gala realia nullah alae blah fellah hallah calla coala zillah galea koala moolah mullah nala palea selah tala wallah qualia walla chaleh mollah challah