loaf
loaves
half
halves
quiz
quizzes
wife
wives
foot
feet
medium
media
man
men
tooth
teeth
elf
elves
leaf
leaves
child
children
person
people
wolf
wolves
ox
oxen
woman
women
fish
fish
scarf
scarves
self
selves
mouse
mice
sheep
sheep
series
series
goose
geese
radius
radii