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.
calla call coala callee cullay callow cola caul calo clay gall gala claw coal cull coaly colly koala cully galah galea gally collie galeae qualia coolly galley quillai gal col quillaia cool gull gale kale cloy clue clew goal cowl kail gaol kill coil kola cole coly
calla walla challa ala all cullay galah gall koala hallah ally quillai fall ball bally bulla leally halloa chalah wallah rally scilla palea cholla hulloa mall mulla nala olla tala alae pallia really cellae sally zillah dually challah mollah tall paella coala hall maill lall bullae pally mullah qualia tally pall cella realia dally nullah sall villae wall galea villa gala holla phalli fellah call holloa hilloa hallo fella wally gally allay chally shall