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.
sheal shaly shall shoal shaul shiel shawl shale sheol shell shaley sheila shoaly shelly shul sial shallow chiel chela shily shill shool shyly chalah chaleh challa chally chelae challah challie
heal sheal wheal shell zeal phial halo shawl shaly shale chela real shiel haul hall leal helo hell heil heel hale mealy hyphal deal weal meal peal seal zoeal vealy wheel hail whale chiel shall shaul teal veal feal sheol shoal
shea sha she shah shaugh shaw shay sheugh shew shoe pshaw sheesh sheuch