child: children
man: men
woman: women
person: people
foot: feet
tooth: teeth
goose: geese
mouse: mice
louse: lice
ox: oxen
sheep: sheep
deer: deer
fish: fish (or fishes for kinds of fish)
moose: moose
series: series
species: species
aircraft: aircraft
bison: bison
salmon: salmon
trout: trout
shrimp: shrimp (or shrimps)
leaf: leaves
knife: knives
life: lives
wife: wives
wolf: wolves
elf: elves
shelf: shelves
half: halves
calf: calves
loaf: loaves
thief: thieves
self: selves
scarf: scarves
hoof: hooves
dwarf: dwarfs or dwarves
roof: roofs
chief: chiefs
cliff: cliffs
belief: beliefs
proof: proofs
bus: buses
box: boxes
glass: glasses
dish: dishes
church: churches
fox: foxes
watch: watches
brush: brushes
class: classes
tomato: tomatoes
potato: potatoes
hero: heroes
echo: echoes
veto: vetoes
photo: photos
piano: pianos
radio: radios
zoo: zoos
kangaroo: kangaroos
studio: studios
video: videos
solo: solos
city: cities
baby: babies
puppy: puppies
fly: flies
berry: berries
story: stories
lady: ladies
party: parties
country: countries
family: families
key: keys
monkey: monkeys
day: days
boy: boys
toy: toys
valley: valleys
cactus: cacti or cactuses
fungus: fungi
nucleus: nuclei
radius: radii
stimulus: stimuli
alumnus: alumni
syllabus: syllabi or syllabuses
focus: foci or focuses
octopus: octopuses
crisis: crises
analysis: analyses
thesis: theses
hypothesis: hypotheses
diagnosis: diagnoses
oasis: oases
parenthesis: parentheses
axis: axes
bacterium: bacteria
datum: data
medium: media
curriculum: curricula
memorandum: memoranda
phenomenon: phenomena
criterion: criteria
appendix: appendices or appendixes
index: indices or indexes
vertex: vertices
matrix: matrices
formula: formulas or formulae
antenna: antennae or antennas
alga: algae
larva: larvae
vertebra: vertebrae
passerby: passersby
mother-in-law: mothers-in-law
brother-in-law: brothers-in-law

Free flashcards from Peabody at peabody.kids/flashcards/la-plurals-irregular