a tooth
teeth
a window
windows
a sheep
sheep
a dress
dresses
a bush
brushes
a box
boxes
a hippo
hippos
a wolf
wolves
a toy
toys
a child
children
a radio
radios
an ox
oxen
a deer
deer
a woman
women
a giraffe
giraffes
a potato
potatoes
a man
men
louse
lice
a mouse
mice
a baby
babies
a person
people
a scarf
scarves
a foot
feet