scarf - scarfs или scarves, используются 2 варианта

day-days, cap - caps, boy - boys, student - students, eye - eyes, school - schools, ear - ears, match - matches, knife - knives, fox - foxes, man - men, baby - babies, name - names, ball - balls, glass- glasses, foot - feet, child - children

days   caps   scarfs   students   boys    eyes   ну  могу сказать толко эти