tooth
teeth
wolf
wolves
person
people
strawberry
strawberries
kangaroo
kangaroos
mouse
mice
horse
horses
knife
knives
sheep
sheep
foot
feet
crocodile
crocodiles
deer
deer
grandparent
grandparents
child
children
parent
parents
goose
geese
hippo
hippos
giraffe
giraffes
penguin
penguins
fish
fish
whale
whales
boy
boys
lion
lions
leaf
leaves