man-men thesis-thesises
hero-heroes cactus-cactuses
ox-oxes dictionary-dictionaries
fox-foxes book-books
knife-knives foot-feet
table-tables class-classes
horse-horses
dish-dishes
day-days
child-children
tomato-tomatoes
person-persons
computer-computers
mouse-mice
wife-wifes
baby-babies
door-doors
sandwich-sandwiches
briefcase-briefcases