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