Study

IRREGULAR NOUNS

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  • bacterium
    bacteria
  • moose
    moose
  • penny
    pence (BrE)
  • sheep
    sheep
  • man
    men
  • child
    children
  • goose
    geese
  • woman
    women
  • phenomenon
    phenomena
  • shrimp
    shrimp
  • cactus
    cacti / cactuses
  • tooth
    teeth
  • dice
    dice (originally singular 'die' plural 'dice')
  • thesis
    theses
  • hero
    heroes
  • ox
    oxen
  • foot
    feet
  • criterion
    criteria
  • fish
    fish / FISHES only when referring to different types of fish/
  • buffalo
    buffalo
  • datum
    data
  • life
    lives
  • calf
    calves
  • fungus
    fungi
  • crisis
    crises
  • person
    people / PERSONS only in legal contexts, or on purpose/
  • analysis
    analyses
  • deer
    deer
  • mouse
    mice
  • torpedo
    torpedoes