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.
wool wooly woolie woolly whole wholly well wawl will weel wale weal wall wily waul wail waly wile walla wally welly whale wheal wheel while willy
fool cool mool pool tool wool shool