regular- paragraph, trophy, nephew, enough, cough, fourth, Friday, physical, roughest, pharmacy, fragile, fluid, briefly, festival, stuffed, triumph, telephone, few
Challenge- misspell, misbehave, misfortune, misdirect, dishonest, discourage, disagree, disgrace, antisocial, antifreeze, antiseptic, reappear, rewrite, recede, nonsense, nonconformist, nonexistent, nonfiction