Dr. Seuss has a lesser-known book called The Tough Coughs as He Ploughs the Dough (based on the observation that none of these -ough words rhyme -- the /tʌf/ /kɔfs/ as he /plaʊz/ the /doʊ/). (And yes, that's not even all of the sounds that are spelled by -ough, like /-u/ in "through".)