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.
walla wallah wall wally wallie wallow waylay will wawl well wale weal wail waly waul welly whale wheal willy wholly wellie willie willow woolly willowy weel wile wily wool
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