Irregular
                spell the plural: tooth
teeth
spell the plural: mouse
mice
spell the plural: woman
women
spell the plural:deer
deer
spell the plural: photo
photos
spell the plural:man
men
spell the plural: igloo
igloos
spell the plural: radio
radios
spell the plural:roof
spell the plural: belief
beliefs
spell the plural: chef
chefs
spell the plural: tomato
tomatoes
spell the plural: fish
fish
spell the plural: hero
heroes
spell the plural: die (roll to play game)
dice
spell the plural: piano
pianos
spell the plural: ox
oxen
spell the plural: shelf
shelves
spell the plural: sheep
sheep
spell the plural: goose
geese
spell the plural:bison
bison
spell the plural:catcus
cacti
spell the plural:octopus
octopi
spell the plural: person
people
spell the plural:moose
moose