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.
shawl sheal shall shoal shaul shale shaly shoaly shaley sial shallow shul sheol shell shyly shiel shill shily shool chally sheila shelly chalah chaleh challa challah challie
shawl awl shoal haul hyphal phial hail hale hall halo bawl shale pawl heal rawly wawl whale wheal shall shaul howl shaly sheal yawl
shaw sha chaw shah shaugh shay shea shew show showy pshaw