half
halves
deer
deer
series
series
axis
axes
tooth
teeth
oasis
oases
life
lives
matrix
matrices
medium
media
moose
moose
alumnus
alumni
wolf
wolves
elf
elves
scarf
scarves
louse
lice
species
species
loaf
loaves
ox
oxen
goose
geese
vertebra
vertebrae
cactus
cacti
analysis
analyses
die
dice
fish
fish
quiz
quizzes
salmon
salmon
bacterium
bacteria
phenomenon
phenomena
man
men
aircraft
aircraft
offspring
offspring
woman
women
person
people
foot
feet
self
selves
leaf
leaves
nucleus
nuclei
antenna
antennae
hypothesis
hypotheses
radius
radii
thesis
theses
sheep
sheep
appendix
appendices
fungus
fungi
wife
wives
knife
knives
mouse
mice
index
indeces
child
children
formula
formulae