run - runner play - player teach - teacher sing - singer write - writer cook - cook read - reader dance - dancer paint - painter drive - driver swim - swimmer speak - speaker act - actor knit - knitter study - student code - coder design - designer bake - baker sew - seamstress garden - gardener shop - shopper clean - cleaner sew - sewer journal - journalist host - hostess organize - organizer manage - manager coach - coach train - trainer style - stylist