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