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