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